Well it's the one example I know of and I experienced it. Any city that allows legal drug use is going to attract addicts. What needs to happen is there also has to be help for them. They have to voluntarily accept help or it is made mandatory otherwise society just sinks. You are not going to have just "average people" taking drugs, you will have hardcore users, mentally ill & homeless too, that's inevitable. It's a nice idea to let people do drugs if they want but there's no reason the rest of the population should pay a price for it. Rehab needs to be a part of the agreement.

Fortunately the rest of the country saw what happened here in Portland so no other city is going to allow drug use without some sort of enforced rehab rules. In fact Portland really put an end to any idea of legal drug use in the US because it made such a collassal fuck up out of it by showing what a nightmare it can become.