Even a modicum of human intervention would help far more than any possible investment into more automated ways to address this problem would. At some point, Google just needs to gird their loins and bring the banhammer down. Yeah, that has problems. I could write about them at length. But that's not the question; the question is now which approach has more problems. I'm willing to try the banhammer at this point. (Though an accompanying investment into Real People that we could actually reach in case of error would be nice, too.)