[jfengel]

Does anything really need to be built for that? From the first moment, you were only interested in a fraction of the Web. There has been a constant arms race between the search engines and the optimizers. We have always relied on suggestions from friends to sort out the "good" content (for whatever definition of "good").

There's much more total stuff now, and probably the fraction of "good" stuff is much smaller. But the total amount of it as at least as high.