Facebook is great. If you don't have teenagers who like to show off they can get drunk added to your friends list, then you needn't be bothered by them. Some people think of it as a competition to get the most friends, but I just choose the people who I genuinely would like to keep in contact with and receive updates of what they're up to.
I like facebook, just a bit of fun (where else can i spank someone and get nothing said to me??? lol ) and a nice way to stay in touch with friends! and i am a drunk but certainly no teenager ;-)