This is something I've been wanting to bring up for awhile.
There are many people that feel the Government, or some other shadow agency is watching our every move, or perhaps compiling information on us. They don't have to, because your doing it yourself with Facebook.
I don't use any of that stuff for several reasons:
Security. Do I really need to let everyone on the planet know who my friends are, where I live, what my hobbies are, what I did last week, and what I'm going to do in two months?
Nothing like letting that online stalker, or burgler know your schedule huh?
Privacy. This is going to be a serious problem in the comming years. From some of the things I've heard, places like Facebook will be able to use any pics you post for adds, or anything they want without your permission.
I don't know about any of you, but I find this totally unacceptable.
I know alot of you guys have these types of accounts to keep in touch with friends and family, so just be aware of what you post with regards to information and photos.