They must work on some strange people in some rare occasions. But until they do, they don't cost the advertisers much so they are worth keeping going. Like with email spam, the perpetrators don't really give a rodent's rectum whether 99.9% of the people it is inflicted on either hate it or ignore it. There are no rules against it and the price is right so they'll keep it going. Get a pop-up stopper and a junk email filter and try not to let your blood pressure rise.