It would seem to me that if the owner of the unit (IE you) does not have a problem with the ‘vehicle’ in your allocated parking space, why would anyone else be concerned.
Just to be certain that this sort of thing was covered, when we allocate a parking space on common property as a special privilege for exclusive use to a particular unit (ACT jargon, might be different elsewhere), we have a clause that the unit owner is free to allow other residents or visitors to use the parking space if they care to do so.