Hm and where do you get the idea that chatting is haram?
I believe men and women are allowed to talk to each other for marriage, or to inform each other about Islam. Of course there is the pardah, physical, mental and emotional, but I think MSN takes care of that Also, if one finds that someone is committing a wrong deed, somethng that is haram, then they have every right to speak out, in fact i believe it is farz upon them. It’s sheer stupidity to judge someones character by their username.