As a former educator, I can tell you that bullies (and bigots of all forms, which were almost synonymous with bullies) in public school were masters of finding ways to be assholes without technically breaking the established rules.
One of the worst ones I had to experience was "TRUMP! TRUMP! TRUMP!" chanting, usually toward a gay kid or someone that otherwise stood out too much . Not much I could do, because "I'm just saying the President's name."