Viggen at SERoundtable forums asked if the search engines ever hired prominent spammers to help their search quality control teams. It's a very logical question, but as far as I'm aware (or Barry is aware), it's never happened. Why would that be?

I can think of some great advantages to a search engine's algo team having access to a high level search spammer, but little downside. The search engineers would have access not only to the specific tactics of how spam operates, but the spammer could continue to operate in the community, run spam sites and help the search engine get them recognized by an automated algo. Black hat folks also have a terrific idea of how the indsutry and community functions, so new patterns and changes could be caught up to quickly and spam prevention could be at the same level of innovation and development as spamming itself.

The only reason against that I can think of is that the spammer could be duplicitous in his/her agreement and secretly leak data from the engine or continue operating spam sites. It seems like a small issue and one that's easy to control, but clearly, there must be a good reason why those with dark caps don't find themselves in Mountain View or Redmond. Any ideas?