When you see Facebook advertising, a large portion of the ads are get rich quick schemes, or lose weight fast, get the perfect abs, etc. All of these are essentially scams, but Facebook lets this advertising flourish, presumably because they are the most profitable, due to the fact they are scams. Does this say a lot about Facebook? If they are prepared to indirectly subject us to scam after scam, then can we trust what they are doing with our data?
Even if you are logged out, Facebook still knows and can track every page you visit. The only solution is to delete every Facebook cookie in your browser, or to use a separate browser for Facebook interactions
I don't have a FB account but suppose that others might be interested.