I am female, not because society told me to be because I was born with a vagina, but because, to paraphrase Kevin Smith, being a girl "just feels right". If that means I label myself, fine, then so be it. It's a label I am comfortable with. This is, in my case, how I was born and how I feel I should be. I am one of the lucky ones, I know that.
Now, that being said, we all label things. It only becomes dangerous when you decide that something labelled, for example, "gay" is bad. For me to say, "I am a white, bi-sexual female" isn't a bad thing. Those are things I have in my life that help me define who I am. I would be a totally different person, with totally different experience if I were not the white, bi-sexual female that I am.
So that's my rant on labels... the moral being, it's not the labels that are bad, it's what people tend to read into them that becomes the problem. That's it from me... voila!