[chuckinca]

Per wikipedia:

Troll:
In Internet slang, a troll is someone who posts controversial, inflammatory, irrelevant or off-topic messages in an online community, such as an online discussion forum, chat room or collaborative content community with the primary intent of provoking other users into an emotional or disciplinary response or to generally disrupt normal on-topic discussion.

Sock Puppet:
The term sock puppet refers to someone who is simultaneously registered under different pseudonyms on a particular message board or forum. The analogy of a sock puppet is of a puppeteer holding up both hands and supplying dialogue to both puppets simultaneously. A sock puppet will create multiple accounts over a period of time, using each user to debate or agree with each other on a forum. Sock puppets are usually found when an IP check is done on the accounts in a forum.

Flame:
To flame someone means to go off-topic and attack the person rather than their opinion. Likely candidates for flame wars are usually religion and socio-political topics, or topics that discuss pre-existing rivalries outside of the forum (eg: rivalry between games console systems, car manufacturers, nationalities, etc.)

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