Very interesting. I was wondering when the internet would get some smart propaganda. Never thought it'd come through third-party cookies but it makes sense given the pervasive networks. Their identifiers are as powerful as SSNs at this point.

Screw ISIS and abortion-center bombers obviously, but how far will this be taken? How great would it be if a climate group changed all the ads on a republican website to point to facts? What if the opposite occurred? =/ In the end this is a worrisome capability. Luckily, Google promises to do no evil! (/s)

We've officially reached the point that if I check out some crazy conspiracy theories I'm on an (advertising) targeting list.