In 2005, band of questionable talent Slipknot sent a cease and desist order to Burger King, asking them to quit advertising their chicken fries via commercials featuring a band that was actually called Coq Roq. Slipknot felt Coq Roq was violating their rights by punking off their incredibly original image that no band had thought of before, not even back in the '70s when KISS did it.
Rather than ignoring them, Burger King responded by filing suit against Slipknot, requesting that a judge declare that Coq Roq was not a rip off of Slipknot. In an actual, legal filing, Burger King reps, presumably with a straight face, detailed how the band Coq Roq is made up of six people in chicken masks named Fowl Mouth, Kabuki, The Talisman, Free Range, Sub-Sonic and Firebird. Also, so the court wouldn't be totally unaware of the finer legal issues, they included lyrics of a Coq Roq song:
Raw desire is the fire I feed
Chicken Fries are what I need
See you standing like BK treat
Long and lean and just out of reach
It's not known if at this point, having read the term "Coq Roq" about a hundred times, the judge decided to abandon law as a profession.
After some meetings, Burger King quietly agreed to drop the campaign (it wasn't exactly going over well with customers anyway, since they were using cock innuendo to sell chicken fingers). Meanwhile the whole thing couldn't have done wonders for Slipknot's image, since it's kind of hard to look at them the same way once you realize they're a group of wealthy men with a team of lawyers in their employ.