Actually, your Karma has been that low for a long time, I don't think you've noticed before. And it doesn't have to be just one person, it could be a post you've made that has gotten on peoples bad sides and every time someone see's it they bite you. I haven't bitten you, the only issue I have is the over use of exclamation marks and I never bite for something as silly and trivial as that (I'm a little bit of a grammar nazi and every post like that does get a little on my nerves but I just ignore it, it is stupid to get worked up over exclamation marks XD).