If you are attacked by a troll, the best tactic is to not respond on the forum. PM a moderator. Responding just gives "justification" to the troll, who can then post further flames and claim he/she is merely responding to others' insults. If there are no retaliatory posts, the troll's guilt is obvious because his or her posts are the only hostile entries within the thread.
Rest assured we will respond. New users who may be used to more "wild" and unmoderated forums will be given some warnings and the chance to adjust to the way we do things, but those who refuse to mend their ways, or who obviously are here to cause trouble, will receive progressive warnings and then bans fairly quickly.
So, please don't feed the trolls. Report them.
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in a credit-scoring postnuclear Stone Age...