How safe is to give your personal information on websites such as facebook, my space and any others? What’s the limit for you?

I think that personal information is very delicate particularly on websites, because the internet is a world of information for the people. In many websites everyone person has Access to our information. They can see the activity of a user, photos, spots, Friends and personal information like age, sex, e-mail, address, recident place, studies, etc. But finally all dependent of the careful that we have with our information because is never an obligation and it is previosly explained. Is our responsability have careful of where and how we publish the information.