What are you, a child? You do realize you can turn down friend requests, yes? Pretending anyone cares enough to Mognet you for your tag before they even request to be your XBL friend is pretty sad.

I am always in party chat when playing online; talking to strangers is not very rewarding. Friends of friends are good enough for chat, but that is the limit. Chatting is good for coordinating and shooting the breeze; interaction outside of the party is worthless.