Why?

One of my few, simple pleasures is the adult swim lineup on Cartoon Network. They run funny stuff like Aqua Teen Hungerforce, Futurama, Family Guy, and The Venture Bros., along with a few anime shows that I like. In other words, they show cartoons that adults can enjoy. That said, why the hell would they start showing this?

I guess the people who are responsible for programming over at a.s. think it's ironic or funny or something, but the fan reaction has been...tepid, at best.