This is a touchy subject that has come up many times on the forum, but not in a long while. Though legal in several countries, must one do a tour through a RLD to get a real "feel" or is this treating the inhabitants as though they were zoo animals? I have long hoped that Rick would change his tour through Frankfurt to skip this RLD area, but as far as I know it is still in his book. Why does he tell tourists and visitors to walk through there? Most of the guides in Frankfurt dislike taking tours there and many refuse to do so, as it is so disrespectful of these poor people, whether they are selling their bodies or doing drugs. The idea that tourists go there and take photos so they can go home and show their friends what a shocking visit to Europe they had, makes me ill.
Amsterdam is doing the right thing:
https://nltimes.nl/2019/03/20/amsterdam-ban-tours-red-light-district?fbclid=IwAR05fYa3GDA-tpjEqWPVHJfh-EljyI5DAGhUwO9obzN8YCybS9b2-_TQGtQ