Here's something you might not know about review sites like Yelp and Angie's List: under a neat little trick of U.S. law, these websites can't be sued by businesses if someone uses them to leave a bad review, but the individual reviewers can. This means the two-page complaint you just typed about the human finger you found in your Pad Thai could potentially lead to you getting sued.

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"What does 'human' really mean these days, anyway?"

Obviously, if a reviewer makes up a story about human fingers in food because she didn't approve of the waitress' hairstyle, the restaurant has a right to take action. That's what defamation laws are for. But some recent threats against reviewers have moved way beyond "dealing with crazy liars" and well into "f**k anyone who doesn't like us" territory. One example is so-called "non-disparagement" clauses. You know those long "terms of sale" agreements on websites that no one actually reads because there's a whole goddamn Internet out there to look at instead? You can just shove a sentence or two in there about how the customer is not allowed to complain online, and boom! You're bad-review proof!

In 2012, a couple in Utah experienced this personally: citing a non-disparagement clause, online gadget store KlearGear threatened them with a $3,500 fine if they didn't take down a bad review they'd written about the store four years earlier. The review site wouldn't allow them to take it down, and so KlearGear graciously reported the pair to a collection agency. The couple ended up losing heat for several weeks in their house because of their damaged credit score. Which is exactly the kind of "we're evil; don't f**k with us" public image a business strives for but so rarely achieves.

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Keep this in mind next time you impatiently rush through the terms and conditions of ExtraLargeDildos.com.

California recently passed a law prohibiting companies from enforcing these stupid clauses, but that's just one state, and that leaves at least, like, 12 to go. And if you're currently shaking your head about lawsuit-happy Americans, note that in the United Kingdom an author recently reacted to a negative Amazon review by taking both the reviewer and Amazon to court, where the reviewer was forced to represent himself because he couldn't afford a lawyer. The case was thrown out only after Amazon paid out 77,000 pounds in legal fees, so if you live in the U.K. and you're poised to write a one-star review of Guide to Bees because "it didn't have enough bees in it," maybe hold off until your bank account balance is looking better.

But not all of them. For example, there's Candace Sams, a romance author who responded to a one-star Amazon review with a barrage of posts that exploded into a 41-page flame war in which Sams eventually threatened to report everyone in the thread to the FBI.

Then there's the author who attacked a book-review site that wrote a "meh" review of her first novel, complaining that reviewers should get permission from authors before they write anything bad about books online. That confrontation ended with the author repeatedly yelling "f**k OFF" at everyone in the site's comment section, which is the sort of online behavior we don't usually see until someone brings up whether or not atheism is a religion on Facebook.

And it's not just little-known writers. Anne Rice, the Vampire Chronicles author who otherwise seems like a really nice person, can get a bit strange when it comes to bad reviews. Rice has used her own site to publicly accuse negative Amazon reviewers of "slander" and of using the site as "a public urinal to publish falsehood and lies."

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To be fair, that description does accurately represent a good 65 percent of the Internet.

It's always difficult to hold back when someone is attacking you online. Luckily, I have a Cracked editor who follows me around and deletes my comments whenever I challenge that one negative commenter to a flame-thrower duel (you know who you are!), but not everyone can afford that. The thing is, when it's a popular author who's throwing an online tantrum, the effects are much worse than when it's a random Internet person. To many book-lovers, authors are practically supernatural beings: they're not immediately present in our lives, but they're capable of creating entire worlds that we love and escape to. If an author we admire shows up in a review section and reveals themselves to be the same type of petty, ego-driven ass as everyone else, it's like a statue of Jesus came to life, pulled up his robes and gave us the finger.

Simoes, showing Vulcan-like levels of restraint and deduction, decided on a clear, logical next step: she composed a fake email under the customer's real name declaring an interest in perverted group sex, and sent this email to 75 of the woman's co-workers. She also posted the poor woman's name to a dating site with similar requests. This olive-based vendetta continued for two years and ended with Simoes being prosecuted under a rarely used criminal defamation statute and sentenced to 90 days in jail to contemplate her life choices.

Then there's sommelier Krunch Kretschmar, who received a one-star Yelp review after a potential customer lost her place in his wine-pairing class. Krunch, perhaps after deciding that the evening's wine was best paired with going completely f*****g insane, reacted to this single bad review by allegedly starting a fake blog in the reviewer's name, in which she "confessed" to embezzling from her employers, taking drugs, and engaging in prostitution. Another lawsuit ensued.

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"Joke's on them. I'll just make a fake blog about the judge's illegal pig-fighting ring."

As crazily as these people acted, though, at least they were defending their own businesses. The world is also full of people eager to do battle with reviewers on behalf of someone else's product. There are the people who started an online petition to get a video game reviewer fired after she dared to give GTA V the shockingly low score of 9 out of 10. Or the Batman fans who decided that a good reaction to the The Dark Knight Rises' sole early bad review was to flood the reviewer with death threats.

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"There is no way anything like this could possibly backfire!"

The response to the review was so bad that Rotten Tomatoes shut down all comments on Dark Knight Rises reviews, even though the reviewer claimed he wouldn't worry too much until someone actually showed up on his front step in response to a bad review. But you can rest assured that no one is crazy enough to ever do that, and we can all hold on to that assumption by not letting our eyes move down slightly to read the line below this one, and ...

Say what you will about Hale: at least she turned back. That's a lot better than the alleged reaction of author Richard Brittain to another Goodreads opinion. After a young female reviewer wrote a long, negative review of his self-published novel, The World Rose, Brittain sent her a polite message and the two agreed to disagree. Wait, no, he allegedly tracked her down via her Facebook page, traveled all the way from London to the town in Scotland where she lived, and then hit her over the head with a wine bottle.

Fortunately, the woman was OK after receiving medical treatment, but she did report what had happened to her both to the police and to Goodreads. Other Goodreads readers have since barraged Brittain's book with one-star reviews, and its ratings have slipped lower than ever, so the lesson here is -- wait, do authors really need lessons about not hitting strangers over the head with wine bottles? Oh well, just in case. Authors, don't hit people over the head with wine bottles.

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"'What do we say to the God of Hitting People Over the Head With Wine Bottles?' Darn, what was the answer to that one?"

C. Coville's book about funny bad reviews, One-Star Reviews, is now available for preorder at Amazon and Barnes and Noble. You should probably buy it.

And be sure to check out 5 Ways You Didn't Realize the English Language Is Defective and 5 Awesome Things With Inexplicably Bad Reputations.