Then think about sending a list of all your friends, family, colleagues, your personal thoughts and commnications on personal matters, to a random, characteristically anti-social CS major you've never met. It's just plain weird. And Zuckerberg was absolutely right in what he said: we're dumb to do it. The problem is this didn't phase him one bit. He went right ahead as if it was all going to be OK. And we just kept sending him more and more info.
Granted, Facebook calls itself a company, and the situation has grown quite large and complex, but I still think of Facebook as one CS student's website. It is what it is.
You send your personal info, in some cases more personal info than you would give your personal banker, your doctor, or your lawyer, through the web to total strangers, many of them are anti-social kids like Zuckerberg, to be posted on his website.
It's a disaster waiting to happen.