Boom, spot on. I'll go even further and say that deleting your account isn't going to be enough. In five years time, computers will recognize your image on all pictures ever taken of you and by combining the information in the pictures, the existing social graphs on facebook (even if you're not on them!) and similar sites but also your email correspondence, public information etc., hive brains in the form of huge data centers will know everything about you.

We've long gone past the point where fighting this evolution has a chance of making a difference. Better get used now to the idea of living in a much more transparent society. Legislation is too slow to catch up with the pace of technological change, and that's not even considering that for legislation you need political will.

(the above may make it sound like I'm opposed to this transparency but I'm not any more - I have a facebook profile, I give out my personal information like candy bars, I don't care any more. It hasn't been detrimental to my life quality, actually I rather like getting targeted advertisements instead of being bombarded with ads for stuff I'm not going to buy anyway. I think when I will be greeted by name by the guy at McDonalds, I'll think of it as quite cool.)