In SF, the following is all legal (no arrest, detention, or citation allowed): I can walk into a government run heroin injection center, request a free syringe, leave with it, throw the wrapper, needle, and plunger on the ground, and use the plastic tube to drink a Coke.
But I can't get a plastic straw with my Coke at McDonalds. Or eat a sandwich on BART apparently.
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