Tina Fey. Hotter than Palin by a stretch.
I think the other factor in flameage is what I call the Armor of Anonymity. Relieved of having to stand face-to-face with someone they disagree with--which might, heaven forbid, mandate a civil discussion--any poster with a redwood-sized shoulder chip can just all-cap the living bejeezus out of their nay-sayer, belittle them and their opinion with blissful impunity and then walk away...if they chose, which of course they won't. It's the online equivalent of going, "Dah dah dah dah" when it's the other guy's turn to talk. You don't know them, technically, and they don't know you, so there's never any need to account for your posting actions. I think most people wouldn't even remotely act this way if they were in the same room with their dissenter.
For historical purposes, I can track my own experiences dealing with the Armor back to the days of CB radio. A microphone, a mouth, and 40 miles between us, you were gonna say whatever you felt like saying about me. We'd probably never meet.