AdWords Site Exclusion Expands to 500 Sites

Google expanded their Google AdWords Site Exclusion tool to 500. But, to be honest, most advertisers are not tracking that granularly, and I doubt many people are blocking anywhere near 100 sites. Yawn.

I think Google needs to give more control to AdSense publishers, allowing them to block keyword themes. A friend of mine recently created a site about video cards and on his video card comparison page he keeps getting ads for crap like Yu-Gi-Oh, Pokemon, and various sports cards. What is up with that? Sure he hasn't got all the comparison pages indexed (as his site is new and that would be 45000 additional pages with lots of similar content to the individual card pages), but what would be wrong with letting him block a half dozen concepts instead of making him need to block 100's of sites?