If you did those things and an angry person tried to find you, they could only do so if a) you post on the official forums, b) you turn on the option that displays your main character's name beside your real name in the forums, and c) you were playing on your main character when you did the foul deeds. I imagine most people would choose not to display their main character's name alongside their real name; that way there's no association between your name and your character.

If someone's going to get angry and track you down, it'll have to be over something you said on the official forums, not anything you do in-game.

EDIT - Also, there are a lot of people with the same character names across servers. Depending on whether your server is also shown alongside your character name in the forum, it might still be impossible to accurately find the person who screwed up your raid.