Earlier quoted context omitted.
The proxy suggestion seems to have merit though, it would still give advertisers the ability to run auctions, track users and ad views, etc, while avoiding domain filtering. OTOH I suspect ad blockers would adapt quickly... it's not clear it would be worth the investment to set up.
It would generally stop advertisers from being able to verify ad impression, or to correlate users across sites. killing the most successful advertising whale (retargeting) in the process.
Assuming that the advertising site would just have a proxy that tunnelled everything to the ad server, would the ad server not get the exact same traffic?
Do you mean that the problem is that the site showing the ads could easily fake more client traffic to the ad server?