I would probably say the only reason he/she has parked like that is to protect their paintwork. No matter what car you drive, it's some peoples pride and joy and they take pride in how it looks. And to be honest I don't blame them.
Whenever I park in a car park, I always try and park well away from anyone else. I never park next to a car that has a baby seat in the back, because 99% of the time, you'll come back to find a dent down the side of your car, same as I never park next to a 4x4
The one thing that really ticks me off is door dings. Someone gets in their cars and BANG, don't give a flying SWEAR FILTER EVADING IS NOT TOLERATED and bashes your door with their door.
Now, you might think they are a selfish #### for taking up two spaces, but they are only protecting their car.
Personally, I wouldn't do it as you'd bound to find some EDITED that tries and parks next to you...fwn
I've only had my Micra less than 2 weeks and it's already got a door ding on one of the doors...grr I just wish the previous owner had taken more care of where she parked, otherwise the other 2 dings wouldn't of happened...grr