Well, not really a full-on intervention with a counselor involved, but in the summer of 2008, my then BF, now husband, his DD and his two stepsons confronted his AS about his drinking and he agreed to go to the emergency room. My now A stepson spent almost two weeks in the hospital going through DTs and was diagnosed with alcoholic hepatitis and cyrrhosis. Around Nov.-Dec. that year, he turned to crack cocaine, was kicked out of the house, has been in jail a couple of times for check fraud and was arrested for crack posession. We recently found out he's drinking again.
I think interventions only work when someone really is ready to quit. My A stepson is clearly not there yet. And I completely agree with Cynical in that the TV shows have spawned a lot of opportunistic people with no qualifications.
Hugs, HG