Yeah, as deficiT said, if the municipality/area allows an exchange/access organization to operate, it'd be unlikely that the cops would outright arrest or set up stings for people leaving, but it depends on the area and it's laws. Here, in my state, I used to live in the only city with the only needle exchange in the state, before they were made legal, and the police turned a blind eye, letting the organization operate and advocate. Now they're legal, there are mobile needle exchanges (think dystopian ice cream truck lol) and if you ARE stopped by the police, and you inform them that you have syringes, used or clean, PRIOR to a search, they won't charge you, to lower the risk of officers contracting diseases from unintended pokes. A full, ready shot may be a different story, but they're pretty much okay with needles here now.
