Originally Posted by gfunkdave

Facebook incorporates some small Flash elements, which can suck resources because Flash is evil. In Chrome it's the worst - something about Chrome's implementation of Flash is buggy and a memory drain.

Facebook makes money through targeted ad sales. If you tell them not to sell your info and they do, I'm pretty sure it's illegal.

Whether you leave Facebook open or not has very little impact on privacy. Browser windows can't generally communicate with each other. The reason you see your Facebook profile photo and a comment box on many websites is that those sites use Facebook's API to provide identification and commenting features. Nobody is tracking you. If you don't like it, then browse the web exclusively in Incognito mode. Or, delete all your cookies when done using Facebook.

The level of paranoia here is really astounding. I thought I was paranoid!!