fine, however many people are not hardened drug users, most are likely to be recreational types, but one slip can cause irreplaceable harm, cannabis smokers for example, can cause paranoia, have seen this in habitual users, do you take away their stash, or are you simply referring to those who shoot heroin. Those on methadone presumably are trying to get help for their addiction. I have seen addicts take it the local chemists, i actually didn't like this, it would have been better there was a side room where they can take it, with someone watching, as the bloke that was in the chemist wasn't. so he could have done anything with it.