postulate 1: users can now thumbs-up or thumbs-down ads on facebook. after rating, there's a a drop-down menu which allows users to flag the ad with why it was good or bad.
postulate 2: at least two-thirds of the ads i get on facebook are for engagement rings, promise rings, or other similar objects peddled by companies to convince people that the only legitimate way to get a woman to keep loving them is to go into large amounts of debt to buy her something useless and sparkly.
Q.E.D.: i am now flagging all Pointless Jewelry Ads on facebook as pornographic.