Generally, when we think of leftist / Communist / other totalitarian moles, we think of the DU clown who just showed up yesterday and gets zotted today. But not all leftists are that lame. I would imagine that there are a few, very cunning ones, who have been here since 1998. Think about it. That's when FR first got on the Clintons' / communists' radar screen. This class of professional mole would know how to appear to be a big tenter, and yet, would also know how to inflict ongoing, substantial damage over the long term. They have never been exposed or banned. Some must still be here.
Yep and they seem to be coming out of the woodwork now.
Another thing I have noticed is that some of the more vicious posters are not the same person every day. They may post under the same name but you can tell from the style and content they are different people. I would not dream of naming names.. heh