it is just a chunk of metal but i totally get where your coming from. Fortunately i have my own drive but to empathise when i use the discovery and do a school run its shocking to see just how nonchalant other people are when it comes to respecting the car next to them in a carpark... not really the kids fault but the parents could take more control when i watch doors meeting doors almost daily as kids wrestle school bags into cars while they climb in too
the awkwardness will come if the damage does happen and you have to confront your neighbour about it is suppose. not knowing the layout of your space, is there no way you can park over to the side a bit more or not park directly next to it?