I think the Knot's folks believe the marginally more expensive economic hurdle (to go out of band) makes an impact to reduce non-monetary tx's, and that with larger adoption of a loose consensus of such deterrents, the effect would grow towards an effectively full deterrence (or much greater than now). It's a valid argument and hypothesis, and I'd like to see it tested, not talked down as not a valid hypothesis.

..gen X forgotten again (and they can also fix the computer)

"You can do anything you put you mind to" -My Dad I would akshually him about the laws of physics and stuff..but now: "You can do anything you put your mind to" -Me