I don't agree with this statement.
i personally have over 1 000 friends on FB, from school, job, clubs etc. everybody are there

Thanks to FB I was able to reconnect with my old school friends after 15 years.
In my opinion, FB is great!
Yep. It's cool, because when you're tired you can get on facebook and read about stuff happening in your community and watching your friends grow up and become father's/mother's. i think its pretty cool in my opinion, however it is definitely spyware, and they are selling your info to the highest bidder without a doubt.
I think everybody doing this, any online company as Google, Apple, Microsoft etc.
So, only way to prevent sharing of your private info is to be offline and never use Internet.