Mat there is a lot I don't know about computers so at the risk of sounding stupid what is trolls??? D Crockett
A troll is a person who posts solely to incite commotion. USUALLY indicated not just by an unpopular opinion, but by the baseless supporting of it.
IE, if a person posted:
"George Washington was gay, and really a traitor!!!!"
Then that's a troll. It's a comment that pretty much no one truly believes, but if taken literally it will inflame the user base and set off a rash of postings that the troll then sits back and watches.
On the other hand, someone who said:
"Obama is a good president, and here's why . . . " (leaving this blank as I haven't actually seen real evidence of this), then rather than being an outright troll, they're merely expressing an unpopular opinion.
Typically, trolls should be ignored. Since they're just looking to incite a reaction, they'll continue to post on a forum so long as people keep responding to them. Their point isn't to debate, but rather to purposely see you argue till you're blue in the face.
The need to ignore them has given rise to the common internet phrase - "Don't feed the troll".