If he came back could you have a filter for his posts like they did for Greenstein at the other board? Like could you filter out any words like slicing, boxcutter, blood, kill, punch, kick, smack, massacre, murder, strangle, suffocate, throttle, mangle, smash, annihilate, execute, pummel,
slam, bash... well you get the idea. And if he used them you could substitute little smiley faces or hearts ?
OR even better substitute the words Scott Greenstein every thing he said something threatening!