Of course, you&#x27;re right. It&#x27;s actually very simple. You as a publisher need to verify ad networks. Ad networks should verify their ads. It&#x27;s your responsibility as a publisher to find ones that do it properly. Because I, as an user, don&#x27;t care about the byzantine world of advertising. I deal only with you, and if you serve me crap, I don&#x27;t care if it&#x27;s your subcontractor&#x27;s fault. It&#x27;s an implementation detail. I blame you, because I interface with you.