I'm so sick of people talking about needles whenever homeless people come up. It's slander, plain and simple.
I used to live in Seattle directly next door to a homeless encampment. I used to walk by it every single day for 2 years. I have never ONCE seen a needle on the ground, day or night. You know what I did see a bunch of? People claiming that there were needles everywhere, without a shred of evidence.