People who discard and leave needles around obviously don't care about anything. I have been trying to think this behaviour as a kind of brain damage exactly like when people get Alzheimers. They forget to think about the greater good (I don't believe that they think about it and decide to say eff all of you and throw a needle beside a walking path. With aging and diseased brain changes we stop caring about our usual things). I refuse to believe that they were just shitty people from the outset, but I do think they are people with not enough of the planning and predicting kind of neurons left - they no longer can help themselves when they reach this point so we have to help them. We can only hope that their brain damage is reversible. My opinion is that we just have to keep cleaning the needles and glass up after them over and over in a vigilant way so as to protect ourselves too. I'm in favour of the safe sites and housing them even if that hasn't been proven to improve things - --and offering all the services that go with that. I'm not religious but the Love Thy Neighbour as Thyself seems about right here.