Internet trolls post on message boards are motivated by the need for attention and the easiest way to get that attention on a mesaage board is to post inflammatory statements. They feed off of the power of being able to raise tension on the message board by getting others angry who respond then leading to back and forth arguing. They will make statements that bait others. The attention they get and the ability to rile up the entire board leads to a sense of importance. While it feels good to respond at the time to get rid of one's upset, it only encourages further responses.
The best solution is to not respond directly and not to get into back and forth arguements. It is better to isolate a disruptive individual who appears to be trolling the board. It is better to ignore. It is better to not feed a troll.
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