> Does the ad network provided content change? Yes, constantly. Does the content provider even know who ultimately will be putting crap on their web page via th

> Does the ad network provided content change? Yes, constantly. Does the content provider even know who ultimately will be putting crap on their web page via the ads? No. Whoa! hold on a sec.. code inside a browser != Ad network, when people insert ads into programs outside of web browsers you will have the same issue, only potentially worse because you wont know if they properly sand-boxed them.