Militant Atheism?

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So what do you think should done with ... people ... who come into such communities with the sole intent of being utter assholes?

First of all if I were to see banning as necessary I would probably ban the people that think anyone who thinks different than they do are utter assholes first. Being an asshole is human nature. So, in a theist forum I would, if forced by popular demand, to ban atheists just for being atheists I would ban the theists instead.

If someone is an utter asshole ignore them or play along with them which makes you an asshole as well. Be honest and fair about that. If it disrupts the forum, and I mean it really disrupts the forum, I don't mean it gets the atheists or theists panties in a bind because they're fucking idiots, then warn, temporarily ban, etc. Eventually, if someone keeps coming back and doing the same thing you may have to get rid of them.

I personally tend to recoil from political correctness or phony "Christian" niceties more than assholery.