@ploum @MacropodCare TMI, but I get your point. The dumbest thing about the searching is when you've bought something already, oftentimes you'll still see the ads trying to get you to buy it. Uh... bought it a month ago, don't need another... not very bright.
Usually I'd use it for research, price-comparing, that kind of stuff and then wait a while... and the ads wouldn't stop. I'd be more worried if the ads suddenly stopped right after I went to a brick-and-mortar store and bought the item instead of online (glances around in paranoia).