More insight into how their ad machine works:
Now Facebook is cutting larger swaths. With the Facebook Purity app, it allows me to remove all the FAKE tracking that Facebook uses. NOW Facebook is assigning "interests" and ads based on my "interests" soley because of what my friends "like". I have unliked EVERY business page and I am only connected to a small handful of friends and about 10 groups. I go through and remove 50-100 of these fake "interests" DAILY!