In the case of the Star Wars vs Star Trek community, those standards are pretty low. To date, I have only banned one person, and that was for being both trollish and abusive. Most importantly, he had taken to starting entire threads for the sole purpose of insulting other users, with no technical discussion merit whatsoever.
In general, the Star Wars vs Star Trek community expects and tolerates a much higher level of rudeness and insult than is normal for general society, and I see no reason why this forum should deviate from those standards. However, while the standards for manners may be lower here, they are still not nonexistent. Spamming, threats, or excessive trolling will be dealt with.
However, "mockery of stupid people" is OK

I hope this clears up those questions a little bit.