AA is voluntary. It may be a stupid idea but it's a voluntary stupid idea. Sure informed consent isn't always there, like when the judge or the prison or whatever forces you there. And it teaches bullshit... but mostly it's a voluntary stupid idea. I have no problem with voluntary stupid ideas. Never have, never will. Buyers of a product of treatment have the right to choose what they want, even if it's bunk. At a certain point you just have to trust in people to educate themselves before they leap. Force them by government? Hell no. That violates their rights to choose which treatment methods to use on their sovereign being. If you want to eradicate AA, educate, and show it to be the bullshit that it is. Google Penn & Teller on AA / 12 Step and watch the videos. They did a good job of poking holes in it.
However I do have a problem with forcing people into AA. That sort of government force has got to stop. People have a right to refuse treatment (and I use the term "treatment" loosely as I do not see drug use as a disease, rather, a choice).