Guidelines to avoid trolling ?

[XIII]

troll 1. v.,n. [From the Usenet group alt.folklore.urban] To utter a
   posting on Usenet designed to attract predictable responses or
   flames; or, the post itself. Derives from the phrase "trolling for
   newbies" which in turn comes from mainstream "trolling", a style of
   fishing in which one trails bait through a likely spot hoping for a
   bite. The well-constructed troll is a post that induces lots of newbies
   and flamers to make themselves look even more clueless than they already
   do, while subtly conveying to the more savvy and experienced that it is
   in fact a deliberate troll.

Got that from here.