There's a time & place for everything. As an obviously over the top, but hard to argue example: I wouldn't go into a classroom of seven year-olds & start discussing pornography. Showerthoughts has always been known to be meant for light-hearted topics - it's even mentioned in the community description, while political topics are explicitly against the rules. It's not censorship to say something is inappropriate in certain contexts or situations - only if you're prevented from saying it in situations where it's perfectly apropos.