I think if that were the case they would not have pushed out the "Panda" updates which penalized content farms so heavily. If their past behavior (with content farms and other "low value" content sites) is a guide they will not do anything until enough people complain about it.

In the mean time it isn't even Google's content so its not a hosting issue, they are just the "neutral" third party providing their 10 blue links (oh and supplying the advertising engine those sites are using)