Uhm, wait a minute. How old is this "teen"? If he's under 18 years old, I'm pretty sure (not positive) you cannot legally throw him out. Biological mothers automatically have "parental responsibility" to their children, to house and provide for them. It is illegal to throw a child under the age of 18 out of your house and discontinue providing for them. I believe it can be considered neglect. Yeah, it's not fair when you're kid is using and making terrible decisions, but its something to think about. If he's over 18, by all means, go for it, but younger than 18 you're kind of bound by the law until he is of age... You might want to look into the law before making any decisions.