wasted overkill
Anything more complicated/ invasive than "you posted about going out to dinner, your profile indicates you're in East Sometown, we'll show an advert for a restaurant within ten miles of East Sometown or for a national restaurant chain if we don't have anything specifically in East Sometown" or "you posted about going to your kid's ball game, we'll flash an advert for a sporting goods store" seems wasted to me, but I don't do fecesbook so what do I know.