You have been driving round the shopping complex car park for 5 minutes looking for a space. It's very full. Suddenly you see a place and it's close to the lifts. But it is marked Disabled Only. You think to yourself. "I'm only going to be 30 minutes. I hardly ever see a disabled person park there anyway. What difference will it make"
It will make a huge difference. If a disabled driver is unable to park in a space wide enough to allow him/her to get out either with wheelchair or crutches and close enough to ramps and lifts to enable him/her to access the building they might just have to turn round and go home.
So please NEVER, NEVER park in a disabled parking space.