Huh. I'm reminded of that story about the guy who's shown surveillance footage of the middle east, and there's a computer that watches his brain because his brain will react to there being things like people in the images faster than he can be consciously aware of it.

Would it work to use such a system to improve filtering while reducing the human cost? Or would it do something akin to what subliminal advertising is credited with, and just push the damage to the unconscious level?