(And for the record, I'll get backlash for this, but with how 13 year olds act nowadays, the word they got called was...well, nvm. You know where I'm going with that. I doubt the performer completely randomly said that word. We also didn't see the full encounter on video. Ok I'll go back to my corner now)
Would a simple/legal fix be
"You are now entering an adult event, with crude humor, adult language, and graphic violence. If you are easily offended, don't enter. If you do, and get offended, you're at fault, as we warned you."?
Nah...too logical.