Issue:
When false and applied to a vehicle, the getin actions and inventory can be accessed, although if you attempt to get in, your screen will end up black and no way of returning to normal view. This can ofcourse be worked around by locking the vehicle, but the mission maker would beed to remember this
(This bug is pre 1.48)

Suggestions:
Enablesimulation False, should remove all actions or interaction with the object so that the object is then just a model with textures, nothing more.
e.g. does not get returned with vehicles array etc, in the case of a vehicle