Behind the seemingly relaxed Amsterdam model there is also a lot of violence, exploitation and human trafficking. Unfortunately full legalisation (done a few years ago) has so far not brought the industry out of the grey zone.

Those girls behind the Central Station are the heroin/crack addicts you hear about elsewhere. Amsterdam also has a Cologne/Hamburg like site for street hookers, with wooden walls, alarms etc. (a prominent alderman of the Amsterdam social-dems was brought down a few years ago because he was spotted there). Right now they're renovating the area, so the prostitutes will likely move elsewhere.