The charging point has to not be blocked by an inconsiderate **** in a rep-mobile whose paintwork is about to get scratched to hell by the charging cable when I "carefully" manoeuvre it around to try and reach my car.
This is the worst of the lot. Had one incident a few months back with a chap eating his lunch in his van, blocking the charger, in an almost empty car park. When I asked if he'd move, I got a "No. I park here every day to show you lot why you shouldn't buy such stupid cars"

I'll throw in a fifth problem; you get to a charger and find there's no way you can plug in because it was installed by an idiot. The Engenie charger at Moreton Arms, Wolverhampton, is a great example. The charger is installed between two parking spaces, but half way down the space. The cable isn't long enough to reach the front of the Leaf, regardless of which way you're facing. The only possible way to use it is to park across several parking spaces...