Warped Tour act claims ban on terms like "mosh pit" and "wall of death"

Oliver Sykes, vocalist of English hardcore outfit Bring Me the Horizon, took to Twitter to claim that Warped Tour officials are apparently prohibiting bands from using terms like "mosh pit" or "wall of death." The singer explained:

By law I'm no longer allowed to say mosh pit or wall of death or anything of the like... So whatever you do- DON'T MOSH. Too many parents [are] suing

(Though the singer said "by law," the rule appears to have been put in place by the Warped Tour, not President Obama or something.)