Why should the advertisement networks be the sole responsible when it is the publisher that subcontract the activity of delivering ads to visitors? The responsibility for distributing malware should be shared between each party that earn revenue from the illegal activity, which include the publisher, the network and the criminal. Passively earning money on criminal activity should not be the primary method that content creator earn money.<p>I also find it very problematic that offline advertisement are held to a much higher standard and required to follow local laws, while web based advertisement can even get away with distributing malware without repercussions.