"Of course, mean people have been a part of humanity for roughly forever. But, on the Internet, mean people have found a home that seems almost tailor-made for anyone with an inclination toward nastiness and hair-trigger anger.
First, the Internet offers anonymity. Real names aren't needed to post comments on many blogs and sites, and real names aren't even required to register on many sites."
If you can't say something nice - don't say it... Love mom.
I recommend the age ol solution of when needed - type your reply outside the forum.. Wait a while and re-read it... Tone it down a bunch... Repeat the process till you've gotten it out of your system...
Ignoring posts from others works well too.
It takes two to tango... Not stooping down to someone's level makes you the better person...
If all else fails - fire back with extreme prejudice... JUST KIDDING