When FR started to get popular and when we made headlines with some research about various issues (Buckhead and the CBS fake memos, letting the MDM media know a picture of a soldier in Iraq being held hostage was actually a GI Joe DOLL - long story), the left started to get worried.
They need to shut us down. That's one reason why there have been lawsuits about copywrite issues files against Jim Robinson.
So the leftists sign up here and either take the time to establish their credentials as conservatives and slowly start to turn, or they don't post for years and then when an issue comes along, and election season ('06) comes along, they go to work.
And they want to post nasty comments that they can then quote in other mediums as proof of the hatefulness of FR members. I totally agree with the system of moderators keeping the threads from becoming IEDs to the site.