It is neither possible nor desirable. Objects that cannot be modified by OpenStreetMap contributors have no place in OpenStreetMap; they could reside in a separate system (maybe "ClosedStreetMap"?) and be added to the mix by renderers that want to use them.

It is neither possible nor desirable. Objects that cannot be modified by OpenStreetMap contributors have no place in OpenStreetMap; they could reside in a separate system (maybe "ClosedStreetMap"?) and added to the mix by renderers that want to use them.