What is actually meant by “trolls” anyway? Is it the guys pimping blogs?
No. Bloggers can post on the bloggers forum. JimRobs problem seems to be with social liberals/libertarians. The whole issue of gay rights seems to be at the core but that's just a guess from some of the things he's said.
From Wikipedia-
In Internet slang, a troll is someone who posts inflammatory, extraneous, or off-topic messages in an online community, such as an online discussion forum, chat room, or blog, with the primary intent of provoking other users into a desired emotional responseor of otherwise disrupting normal on-topic discussion.
No.
Usually they are liberals, progressives, and DU tpes joining in groups (reinforcing each other) pretending to be conservatives, pro-God and pro-Country, but their posts and their arguments, sooner or later, betray them.