This writeup isn't about the mythological monster but the other kind: messages (usually on mailing lists or Usenet newsgroups) intended to elicit inflammatory remarks.

What to do about trolls:

  • Ignore them. This is the most important rule and I cannot stress it enough. If you see a troll, ignore it. Posting a message along the lines of "Ignore the troll" does not count as ignoring the troll.
    This is because truly dedicated trollers are looking for attention, and even this kind of sideways reference feeds them. Don't do it, hmmkay?
  • If there is someone who insists on replying to trolls, and you're reasonably sure this person is not a troller himself, find an alternate, private means of telling them to ignore the troll--one that the troller can't see.
  • Make friends. Surprisingly, this sometimes works.
  • Reward good behavior. Most people are not completely malicious; occasionally they produce something worthwhile, and this should be encouraged.
    However, they may be trying to lure you into a worse situation. Be prudent and think strategically.

That's all for now, I'll post more if I think of any later.