I used to shy away from any confrontation, but if someone insults me now, then I'll stand my ground. It's normally immature twelve year olds that are trying to entertain themselves by trolling someone, so they're not hard to take down.
In real life, I still shy away from confrontations, but only when it's in an area like work or something where fighting will only cause problems. If I'm anywhere else, I tend to not attract any attention to myself, and it's actually been a few years since I've really had to stand up for myself, but I'll do it if I have to. Otherwise I'm pretty laid back and will let everything just slide off.