Your notion that you can simply maintain privacy by not using facebook is part of the problem.

For a long time facebook tracked people using flash cookies (also called Local Shared Objects) to track people with opinions flawed like your own around various website that are not facebook.

What if they use some more devious tricks now? You might say that you use noscript, adblock or something else, but what about profiling you based information created by you browser. Browser fingerprinting - https://panopticlick.eff.org/ - http://en.wikipedia.org/wiki/Device_fingerprint

I would rather simply avoid facebook and deal with people without a history of ethical issues.