If you're correct, you've uncovered some 0days in the wild. Go figure out which site, capture what happens, and turn it in to the respective browser developers

If you're correct, you've uncovered some 0days in the wild. Go figure out which site, capture what happens, and turn it in to the respective browser developers for a nice bug bounty. Or, you know, maybe they aren't wasting a 0day on "obviously bad advertisements".