We are having this discussion despite we already have the necessary tags to describe all relevant aspects, only because some map data consumers do not take them into account. And these tag are not only used, they are completely established (sac scale, trail visibility, hazard, etc.). There will always be people acting irresponsibly, people driving their cars into subway entrances because it looked as if it was possible on their satnav. The best map will not prevent this, and they will probably take these paths even if they are not on their map. If some map publishers do not distinguish more difficult paths from simpler ones, and people get into problems because of this, it should be raised with them, in OSM the information is already available.
Otherwise, where will it stop, are we going to remove places from the map where people are robbed or shot much more often than in others? In the past, people wanted to tag perceived (or actually statiscally proven) dangers in some urban areas in places with big social and economical heterogenity. Cheers, Martin
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