> If a trained human can recognize spam in its many forms, then it's possible for spam detectors to do the same without relying on obscurity. You mean... it's

> If a trained human can recognize spam in its many forms, then it's possible for spam detectors to do the same without relying on obscurity. You mean... it's theoretically, some-time-in-the-future possible? What, we are all to put up with terrible search results until such time as strong AI has been cracked? I think not. It is perfectly valid for Google's spam detection to "rely on obscurity" if that is the best currently-available solution to the problem, and your criticism on this point is not very reasonable.