I use MSN like food but as Claire rightly said I don't add no one whom I don't know. Facebook account was made by my friends so what goes on there I have no idea. They change things and add things as they like
I've also facebook and msn. I could maybe give my facebook account/msn to my web friends but only if I'd discussed with them a pretty much and long time. Sometimes I've searched msn friends on the web but want still to watch out it who'll get my msn because there are my whole name on the address.