As seen recently in, well, in the alarming amounts of web surfing that goes on at our house:
Libtard ('nuff said)
Celebritard (Those people who think they know everything and really annoy those of us that do)
...and the newest: Flametard (Apropos name for people that insist on posting derogatory comments to obvious flamebait, i.e. any post about Internet holy war topics, such as Mac v. PC, Windows v. Anything Else, Microsoft v. Anything Else, G.W. v. Anyone Else, Republicrats v. Democans, etc., etc.)
(If you don't know what "flaming" is, consider yourself to have a life.)
Be sure to use, uh, liberally.