The more people paid attention to them the more destructive they became. After a while they stopped because they we're drawing any attention.
Yeah, we tried that in /r/atheism on reddit, and also in /r/atheismrebooted. It didn't work very well. The communities were too large and too attractive a target. For the moment snapzu is a smaller community and not that attractive to trolls. If we get big enough, that will change.
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