I, in general, am
very nonconfrontational, but hit the right buttons and I can get really heated. Like the time I got an in-school suspension for bitching out a substitute teacher who thought getting in an argument with me over the health of designer breeds was a good idea.
On the internet I am WAY less confrontational than I am in real life, not really sure why, but I am.
ETA: Just wanted to say that the sub was also a tennis coach for an opposing team and had been an @ss to me before and accused me of cheating, so we had history, I don't just go around slaying people
. I try to educate first, but as soon as he called me "little missy" and said he had "a lot more experience than me" everything kinda just went downhill...