Totally agree. People live on it, they seem to be loosing their reality life.
On my old facebook account they had my old mobile number. They then started to text me at 4am with message updates. I then deleted the account and changed my phone number.
Facebook is huge, too many people hooked on it, they are earning millions. It's all a money making scheme, they probably sell your details too to make money like Microsoft do with Hotmail accounts.
Just like Google do too. People think google is a search engine but in reality it's a marketing company. They save the details on everything you do and search for into a database and sell it.