This comment, I think, sums up the absolute ignorance associated with this issue. What an incredibly stupid, offensive thing to say. Drug addicts are not comparable to wife beaters. In many cases their supposed "choice knowing the risks" as someone up there pointed out, was not an informed one, but the product of pressures that they couldn't deal with. There but for the grace of God go all of us, to say "I'm different" is naive, and I speak as someone who has never tried ANY illegal drug, or even so much as smoked a cigarette, in my life.
Now there are two separate arguments here. Firstly, whether or not it's helpful. Given that you all seem to have abandoned this line for the second argument I'll just assume we've provided strong enough argument on which to conclude that it is helpful?
The second line, which everyone is taking up now, is that the money could be better spent on education programs, rehab clinics, etc. I will not deny that these things are equally if not more helpful to the problem. However, it would be naive to think that any of these programs can eliminate the problem of drug abuse altogether. As a result, having SIS facilities as one option or one means by which to ameliorate the problem that currently exists and will continue to exist no matter how much money we put into prevention, we are spending money in an effective way to improve the situation. I look at the existence of SIS as a step on the road to rehabilitation, but rehabilitation isn't something that happens overnight. It takes a long time. And there's no reason not to allow addicts some dignity and safety while they cope with their addiction, and, with some encouragement and a bit of help from the right social attitude, maybe they will recover... of course, not treating them like abusive spouses would be a good start.