Positive reinforcement is simple.
"Hey! don't do that! Thanks!"
From my experience with sonic, I'd think he'd assume someone went "I was right!" over "eh, that was too harsh"
when what we're going for is "If I can't improve on my behavior, and will impose on others, I don't get to do things on meta, so I need to improve"
and our interest is in seeing long term, sustained change in his behaviour
@ShadowWizard quite frankly, unless someone is sitting on a year or a decade, and asks, very nicely and shows signs of improvement... it dosen't happen.
so, that's not happening.