What makes you say that? Ads are generally powered by webviews, and there is little that Apple can do to determine what is desired behaviour and what is nefario

What makes you say that? Ads are generally powered by webviews, and there is little that Apple can do to determine what is desired behaviour and what is nefarious. Unless you are suggesting iAds should be the only game in town? Web standards are introducing resource limits that can be used to prevent this abuse in the future, but that is not platform specific.