Do you know of any interventions that worked?

I think these things called interventions are used in a variety of situations where concerned friends and family want to change the self-destructive behavior of someone they care about. I’ve heard of kidnappings and days and days of deprogramming, and of forced hospitalizations. I’m sure there’s more.

Have you ever been either the subject or the proponent of such an intervention? What did you do? Did it work? Would you recommend it as a useful procedure?