"Heck, we do that here."
Thats unfortunate. It is one thing to remove a rude and offensive person who is attacking users. It is a completely different matter to censor unpopular ideas. In my view the whole point of sites such as these is to "filter" through these different ideas to find one that is most appealing to you or makes the most sense and just to have fun.
Censor? Censorship is government power. This is a private website and the owner can invite and disinvite whoever he wishes.
Do you think someone should be able to show up at a party you are holding uninvited, say stuff you don't want to hear but you shouldn't be allowed to toss them out?