This leads to no good end. No argument was won by beating someone over the head with stick or tongue. Likewise, don't let the flames of others singe you. The best advice I can offer you is to ignore flame throwers. Some people become known as trolls because they join mailing lists and newsgroups in order to start flame wars.
Responses only feed their fires.
Be careful what you say. Your email might be misrouted. You might accidently misaddress an email message. As web crawlers and other indexes develop more powerful search routines newsgroup and discussion posts are more easily retrieved. The angry, spiteful or sarcastic post to a newsgroup or mailing list may be read by a potential or current employer or by a friend or collegue.