During my marketing and analytics classes, I like to "open the kimono" and reveal the naked truth about my Facebook and Google advertising profiles - and how ridiculous they are. If you want to have a good laugh, go check it out!
You could spend hours tweaking your Facebook ad preferences - in fact, you can't, because it only allows you to say "no preference" or "I want less," but no way to say, "I don't want this." All of this would be for nothing because the second you continue to navigate the interweb, the Facebook pixel will be waiting for you like cockroaches in a cheap downtown hotel.