Should Google Support Useless Sites?

Simon Dumenco writes in AdAge:

Meanwhile, everybody talks about how Google’s AdSense program is great and revolutionary because it’s given all manner of Web sites and blogs easy access to advertising dollars. But actually, I think it sucks that AdSense offers automatic, indiscriminate ad support to lots of awful, amateurish, useless sites. Forgive me, but I’m nostalgic for the days when media buyers, rather than computer algorithms, decided what advertising vehicles were actually roadworthy.

As an inevitable side-effect of the spread of democratic new media, lots of garbage has accumulated on the web. Simon poses a very important and appropriate question: should Google AdSense, Yahoo Publisher’s Network, and other big algorithm-driven Ad networks support these, without any calibration of whether their content is worthy of advertising dollars?