I haven't played online games for a while but it's true, I used to get frustrated by campers so much that I got pretty good at using them for my main frags. When people decide a single spot in a level is good and they're always there it doesn't take long to come up with a whole variety of way to deal with a single situation.
Probably a mixture of Lawful Evil / Neutral Evil. I rarely game but when I do I'm doing it for fun, if you try to dictate to me what I should/shouldn't be doing I'll probably purposely do the opposite. Some people take games way too seriously.