One fan learned that lesson the hard way this weekend, during some post-game libations at a bar near Wrigley Field in Chicago.
NBC Chicago reports:
A YouTube video posted Saturday shows a man dressed as "Billy Cub," an unofficial mascot of the Chicago Cubs, punching a patron in a bar after he removes the head of the costume. John Paul Weier, the man who has been playing the role of "Billy Cub" for the last six years, says the costumed man seen in the video is his brother, who frequently fills the role. Weier says his brother was being harassed by the patron long before the video footage began. He said the man was punching his brother in the back, shoving him into the bar and continued to poke and hit him until his brother confronted the man. ... "A drunk guy threw himself into [Billy Cub] and I happened to have my camera so I started recording and it all happened real fast," [witness Renae Kondrat] said. "I wasn't surprised. You're not supposed to take off the mascot's head, everybody knows that."
This isn’t Billy Cub’s first forray into controversy: Weier received a 100-page cease-and-desist letter from the Chicago Cubs last year, demanding he stop performing as an unofficial mascot.
So far, the team has not taken any further legal action.
Update: NBC Chicago has posted an interview with Patrick Weier, the mascot in the video: