This is a good idea and a much needed service. I was reading an article yesterday about android malware that opens web views in the background that appear to be

This is a good idea and a much needed service. I was reading an article yesterday about android malware that opens web views in the background that appear to be from reputable sites, and then places its own ad inventory in them. The user never sees the ads, but the exchange thinks it’s showing ads on, e.g. cnn.com. It seems like your solution places auditing responsibility on the side of advertisers. All advertisers should be doing this, but I can’t help but think it should primarily be the responsibility of the exchanges themselves.