Yeah, it'd be a good time, but an intervention to save the endangered CWC really isn't possible. For one thing, you need plenty of family and close friends -- people the interven-ee cares about enough that he/she can't dismiss what they're saying. Unless there's a pile of hitherto-unknown friends he cares very deeply about (there isn't) it'd be up to Rocky and Barb, and that wouldn't work. Personnel questions aside, the kicker is that he'd have to be made to understand how he's hurt all these people, that he was lying to himself about who really did wrong, and resolve to do things differently. He's not going to give up his cherished belief in the evil that lurks in the heart of da twolls, Megan, Snyder, and everyone else on the planet -- they have to be evil, because how else do you explain what's happened to him? He'd have to admit, apologize, show understanding, accept responsibility, and explain about the changes he's made. Unfortunately, it's always your fault, and he'll ignore anyone saying otherwise. No matter how hard you hammer on it, the square peg of reality ain't gonna fit the round hole he's spent years preparing in his mind.
He needs more help than an afternoon can give him. A year or three of afternoons, maybe.