Internet troll

On the Internet, a troll is a person who posts messages that create
controversy or an angry response without adding content to the discussion,
often intentionally. Though technically different from flaming, which is an
unmistakable direct personal attack, trolls often resort to innuendo or
misdirection in the pursuit of their objective, which is to create
controversy for its own sake, discredit those with whom they disagree, or
sabotage discussion by creating an intimidating atmosphere.

Note that this is a highly subjective term, as everyone is affected
differently by the nature of the term deemed a "troll".

Originally this term applied to people who were intentionally posting
flamebait, by analogy with the fishing technique of trolling:
metaphorically, these people were dragging a conversational lure through the
group, hoping for a response. The concept of "this person is trolling our
newsgroup" became shortened to "this person is a troll", and picked up the
association of the monster trolls of folklore.

Trolling mostly maintains its earlier meaning of posting messages
specifically in order to elicit a particular response, usually anger or argument.

The noun form, troll, is sometimes used in the more general sense of someone
who stirs up controversy, whether or not the controversy itself is their goal.

Frequently this is used to discredit one position in an argument. By
asserting that one's opponents are trolls, one is asserting that they are
only maintaining their position in order to feed the flames, and that their
position is actually indefensible. This use of "troll" is however then an ad
hominem argument, and is itself thus usually indefensible - most correct
views have historically met with opposition, so the label "troll" used this
way is actually more likely to indicate a correct but controversial position
that is stirring up flames precisely because it has challenged a doctrine
others actually realize is wrong.

That said, it is quite possible to stir up controversy with a wrong argument
- but these can more effectively be met by simply responding to the
substantive issue.

It is safer to use the term "troll" to apply only to insubstantial irritation:

Common types of troll messages:

   * off topic messages -- "Can anyone help me make a webpage?" "No, this is
     a music forum."
   * inflammatory messages -- "You are an idiot for including this type of
     message in your list."
   * messages containing an obvious flaw or error -- "I think Star Wars is
     Roman Polanski's best movie."

An example of a troll message in the newer sense would be one that denounces
a particular religion in a religion newsgroup -- though historically, this
would have been called "flamebait".

A variant of the second variety (inflammatory messages) involves posting
content obviously severely contradictory to the focus of the group or forum-
for example, posting cat meat recipes on a pet lovers forum, posting
evolutionary theory on a creationist forum, or posting messages about how
all dragons are evil in the USENET group alt.fan.dragons.

There is some generally-accepted wisdom about dealing with Internet trolls:
"Don't feed the trolls, that will only encourage them." That is, do not
respond to them, that is the attention they desire. Somebody who does
respond to them is likely to hear "YHBT. YHL. HAND." from other members of
the group, which means "You have been trolled. You have lost. Have a nice day."