Um, who the hell is she to tell me what I can or can not say.
Am I being wrong about this? That really pisses me off!
If she was able to read it then it means everyone else could too. I think she was completely right to tell you off for this. If she had come to you about it for saying it to your boyfriend in a private conversation then that would have been butting in and no, I don't think she should have been able to tell you off, but you get no sympathy from me for using that word in a derogatory manner in a public forum.