These should all be added from the get go then. Trails should not be added without the appropriate metadata. 
I still take the stance that trails like this that the local community has worked had to keep off the map shouldnt be mapped at all as all it does it expose users to unneeded risk. 
If they are to be added then a) it should be with full and proper tags and data and b) with the expectation that consumers of the data respect the tags. 
Point b above is a HUGE issues as far as I can tell none of the data consumers respect that tags. 