To be clear, no one has ever walked away from one of these spirited comment debates on superior races, or domestic battery, or whether mass shootings happen because God is mad at us for being nice to gays, and thought, "Boy, the things Slipperydick311 said really opened my eyes. Time to get my life back on track." In fact, there's a good chance that whoever you argue with online is genuinely crazy. Just because someone has fingers and a keyboard doesn't mean he or she is a normal, functioning human being. If you saw a crazy homeless person in the middle of the street shouting that the Holocaust was a myth, you wouldn't engage that person in a discussion about why he's mistaken. You would just keep walking, because you don't know that man, he's not convincing anyone, and, I can't stress this enough, he's crazy.
"Mexicans have tails!"
You can never win, because you're not fighting against a belief; you are fighting against a psychological imbalance. Yet if that same man wanders into a library and manages to peck out some sentences at the bottom of a YouTube video on a public computer, why on Earth do we allow that to hold more weight?
Worst of all, gifting attention to lunatics online has birthed an entirely new breed of insanity: the troll. A troll is equally as crazy but less interested in convincing you of fringe beliefs and more interested in attention. He will shout just to shout because he has seen firsthand that you will listen, and unlike the other crazy people who started this problem, the troll is only interested in acknowledgement. It's such a confused, strange approach to human connection that I'm not entirely convinced that even the trolls know why they're doing it. But they will be around as long as someone is willing to argue in a comment section, which means they are here for good, and it's the fault of every person who was foolish enough to think they could ever help another human being.