The problem with no-enforcement is that it allows selective enforcement. In NYC, if you are on Wall St and use hard-drugs, there is no enforcement. Yet with stop-and-frisk and entire generation of colored individuals in poorer neighborhoods got random stopped, frisked, and booked with criminal history for "possession" offenses.

https://en.wikipedia.org/wiki/Stop-and-frisk_in_New_York_Cit...

If it is really no-enforcement, best to codify it with a law and really make it legal.