addicts

I just came home from the mall and kind of experienced a realization. While walking through the mall I over heard a conversation with two teenagers.

This is what they roughly said:
"Yo man, this got me feelin' nice." Says Kid One.
"What?" Says Kid Two.
"The morphine got me feelin' nice." Says Kid One.
"See, I told you...." Says Kid Two

Last year, my science teacher told us that some doctors give out clean needles to people who inject themselves. Now is that wrong? If they inject themselves anyways and its illegal, would it be better to hand out clean ones to stop infection from spreading and stop STD's, HIV and AID's?