I would hate to have features on the map deleted for lack of appropriate tagging. There are tags available that describe data as non-accessible. I would think that the responsibility falls on those who create the apps referencing any OSM data to filter and grab the appropriate data based on its attributes. Im not sure if this is an issue with the fact that the data exisits so much as it is an issue with how the data has been attributed. If the data is tagged incorrectly, that is an easy fix.

Back at it!