Ah, needle exchange. Still so many against it.

Not me.

As wiki nicely puts it:

A comprehensive study by the World Health Organization (WHO) in 2004 stated that there is a “compelling case that Needle & Syringe Program’s substantially and cost effectively reduce the spread of HIV among IDUs and do so without evidence of exacerbating injecting drug use at either the individual or societal level.” The WHO’s findings have also been supported by the American Medical Association (AMA), which in 2000 adopted a position strongly supporting NSPs when combined with addiction counseling.