I wonder if there is a possible system where google goggles could replace QR codes, like a physical adwords. The advertiser submits their ad, google slaps a 'official google ad' watermark in the corner for orientation, and pairs the image with the desired url. QR codes already assume that the user has internet access. Users are much more friendly to the idea of holding their phones up to a billboard because it asked them to. Hijackers would need to run a card through goggle payment processing to get a dirty url to work in the system. And what does the advertiser get out of the whole thing? Analytics.