Generally we police ourselves pretty well and weed out those that are most offensive.
I admit I have sent PMs to the Admin only to advise them there could be an issue to watch for.
I believe extremists should not be given a platform from which to launch their hatred.
Here we go again, your definition of "Extremist" and their hatred... I try to balance freedom of speech with common sense..
Just because you disagree with it doesn't make it hate...