Yes, Virginia, there are paid trolls. There are people who are paid to populate the "blogosphere" with negative, nasty right-wing posts.
I'm not going to provide the link, but you can Google if you wish and find them. There's a company out there called "Advantage" something or other. They make money hiring trolls. Their website says:
"Get ahead of your opponent with Professional Blog Warriors. Be prepared to "flood the zone" with comments from professionals who are ready to put your talking points on the blogosphere 24./7."
There is absolutely no way to ferret these people out by using their IP addresses as they are working from their own homes. But you can usually tell if you look through the history of their posts. They post a lot, and often they seem to "log in" and "log out" on the hour or half hour.
If someone calls them out, they will just rejoin with a different name.
Nobody would take such a job unless they were of bagger-thinker ilk anyway.
And, if someone is as heartless as many right-wingers who post at Huffington, Newsvine, and other blogs, I'm very glad that they aren't "wasting taxpayer money" collecting unemployment insurance. However, I do hope they are paid as independent contractors so, when they are dumped, they don't get a dime in umemployment benefits.
P.S.: I just heard of a few good articles on the phenomenon known as "astroturfing".. I will find the links and post back.