I don't believe that these sites encourage drug use. They're only located in areas that already have a high rate of drug use. It's not like they are plunking them down in suburbs.

The thinking is if you can't stop people from using drugs, then at least try and stop the spread of diseases associated with intravenous drug use (like HIV).

Also, these centers are great places for people to get help if they decide they want to get clean, and have even helped catch human traffickers and a serial killer.

So there are upsides to them.