I've been offered behavioral therapy as an adult, but now I see that fortunately the psychiatrist in charge was dismissed before it would start. Later I learned that he wrote down I "don't meet minimums"... and now I think I know what he meant: there was a session where I'm pretty sure he was trying me out, buy didn't manage to provoke me. F-ing thank the FSM.
The only time I've done something remotely similar, was with a stray cat that wouldn't stop attacking everyone: put her in a dark bathroom (with food, water, and a litter box), turning the light only every few hours to offer her to come out to me. Took the stubborn thing 3 days to make up her mind... and from then on she became a fluffy ball with just the occasional minor outburst. I still admit that was basically torture... except the alternative was to either throw her out back onto the street, or give to a shelter with a 24-hour "no adoption, no cat" policy.
It's hard to believe anyone would advocate doing something like that to a person.