I know a guy who went to the University of South Carolina (mascot: Gamecocks) back in the 70s. On a lark he and some friends ran a huge banner out their dorm window prior to a big football game against an arch rival, reading “WE WON’T LET CLEMSON LICK OUR COCKS.”
My friend soon got a call from the Dean strongly suggesting he take the banner down post haste if he enjoyed attending the University. He complied.
Then he got a follow-up call later that day in which the Dean sheepishly asked if he still had the banner. Apparently a rich alumni donor had seen the banner earlier that day and had thought it was hilarious, so back up it went.