[fzzzy]

They’ll just serve the ads from the same ip as the content then, or even embed it right in the same request as the content.

[FridgeSeal]

You’ll face kickback from ad agencies over that: the third party requests are also used by the agency to track that the impression/click/etc did actually occur and the publishers aren’t just lying about it to boost their numbers.

[fzzzy]

Hmm, that's interesting. Makes sense.

[greglindahl]

Adblockers have been around for a long time, and few websites use the workarounds you suggest.