You have to keep your spam report numbers very low as the sender of such things, if you want to be allowed to continue to legitimately send them.
Showing a bunch of low-quality "1 weird trick ads?" the network gets flagged. Trying to squeeze too many ads onto a single page? Publisher gets flagged.
I doubt we'll see such a thing. On the other hand ad networks like the deck, carbon and yoggrt have done a good job filtering out bad ads. I generally whitelist sites with those networks.
The upside of those kind of ads is that they are intended to be both a useful tool for the user and a revenue source, and they must be designed carefully to remain both.