> people can sell their property for as much or as little as they want This is correct, and when you figure out a way for people to sell only their data to FB/

> people can sell their property for as much or as little as they want This is correct, and when you figure out a way for people to sell only their data to FB/whoever, I will be right onboard, but while companies like FB are sucking in as much data about me as they can, in ways I can't control, I will have to disagree with you strongly.