My eyes! Where did all these ugly people come from?
But seriously though, you're telling me that they're going to be able to enforce that? I highly doubt an algorithm to determine if an image has been manipulated will work well on 72ppi made-for-web images in ads to automate this process. Seems like more useless bureaucracy that will be let slide in implementation until it's convenient to do the random shock-and-aww on a big name or to cut someone down to size when their competitor paid off the enforcement person.