That creates a light-cone of taint, and really gambles on a big enough portion of the economy caring about taint. Also, hard to taint coins you don't realize e

That creates a light-cone of taint, and really gambles on a big enough portion of the economy caring about taint. Also, hard to taint coins you don't realize exist. Not that I have any of those, mine are all from exchanges, but miners could easily have backup coins, as could OTC traders