LinkedIn claims to be a "business networking" site, and it appears to be pretty much legit. But somehow, somewhere along the way, it opens up your contact list and sucks up all the names. No doubt it "ASKS" you for permission, but I don't remember seeing any permission form. I dislike it for that, but I continue to stay with it because there is a certain need to have an online presence, and I have connected to several people I know professionally that I had lost touch with.
So while I can't label it as evil, i wish they were more above-board in how they gather names.