You don't have to tell Bill Mahar that words have consequences. Remember when he got fired from that network show for saying something that got conservatives so worked up they threatened to boycott Disney if ABC didn't fire him? Something about the military...
Now sure how comparing what a comedian says on a night time talk show has to do with teachers having to teach the curriculum, the locally elected and funded school board directs them to? Other then maybe it goes back to my point- that when you are working on someone else's dollar, what comes out of your mouth can have consequences in your continuing to work there.