Here is a recent study of drug consumption room programs across Europe (including the one in Paris), and their impact so far. http://www.emcdda.europa.eu/topics/pods/drug-consumption-roo...

Their analysis seems pretty balanced, and seems to skew positive. It definitely contradicts the negative comment you're responding to.

I've never seen sources backing up what he says. According to this source results are positive in term of reducing consumption in streets and syringes found in streets. It also allowed to diagnose users with transmissible diseases and provide treatments.

Neighbours of the injection site do complain of increase disturbance in the area but it seems due to the fact that it's the only site in Paris.

Since the one opened in Paris, another one opened in Strasbourg and one is gonna open in Bordeaux this year

http://mobile.lemonde.fr/societe/article/2017/10/12/premiere...

There must be a lot more data from sites in Germany, Netherlands and Switzerland that has been opened for much longer.

Sources are very hidden : first result page on google (I'm talking for french people)

http://www.bfmtv.com/police-justice/paris-emotion-apres-la-m...

http://www.leparisien.fr/paris-75010/paris-le-cri-d-alarme-d...

https://www.google.fr/search?q=riverains+salle+de+shoot&sour...

to sum up : the neighbours are very unhappy about it. The area was already largely insecure, though (heaven of crack-heads).

I don't think the principle of safe site is bad, but it needs a good management team because - by definition - you can't expect any well disciplined behaviour from drug addicts.