It's incredibly frustrating to see how search quality is an arms race just like email spam. First there was keyword stuffing, then link trading, keyword stuffing on many other sites, blog spam, made for AdSense pages and now we don't even understand what is going on.
There's a lot of ways you can trick or "hack" Google. I can think of 2 or 3 right now that might work, and I'm sure there are others.
This looks like something that involves a lot of resources. We may be seeing the beginning of a sort of economic Web war, where one side spends tens of millions to break into and use a trusted system and another side spends tens of millions to prevent it. We've seen a lot of little petty stuff with botnets and DOS attacks over the years, but it could be that the game is scaling up to a even higher level.
