I’ve quit Facebook. Here’s a high level overview of why; read the link below for specifics. Then ask yourself why anyone in the right mind would participate in it.
Remember, this isn’t just about the technical stuff. By staying on Facebook, you’re granting them permission to collect and use information about you, regardless if you even using the Internet. And by staying on, the data they collect on you gets used to create models about your closest friends and family, even the ones who opted out.