Couldn't agree with you more.
Some people's idea of 'fun' revolves around others suffering.
Others might have the best intentions, yet either fail to act through their ties on the site or decide they'll do similar back, much as a vigilante would.

Sometimes playing nice and understanding or remaining oblivious doesn't do jack though so it might be better for some of the alternatives to be explored. If nothing works, at least a guy can say he tried.