My Msn Address How Do People Get My Msn Address?

How do people get my msn address? - my msn address

Ok how come when I my inbox every moment is MSN a message from someone in a random open, say they have a porn video on the forum want to see me? I've never ever heard of Google Groups to find these people as my address? I used to spend a lot with Yahoo, but it is now, if instead of Google Groups? As they are and there is a way to stop it, because the really annoying!