JulianA - what a **** selfish attitude to have, if people didn't have children than humanity wouldn't last too long. Trying to get a couple or even one child out of the car and into the trolleyand then into the supermarket can be especially stressful for parent and child. Trying to do it in a normal space can be nigh on impossible. That bit of extra space makes ahuge difference and being closer to the supermarket means that the child or baby are exposed to the elements less and it is safer, especially when you have a toddler in tow. It is a pretty hard job bringing up children and simple everyday tasks take on a whole new level of difficulty.
My kids are 11 and 7 now and I don't park in the parent and toddler bays as they can quite easily walk to the store and are well aware of the dangers of a car park.
It is just pure laziness and lack of consideration for others that may not find shopping such an easy task that makes people park in Mother and toddler/Diabled bays.
So think of others for once and stop being so self centered.
Oh and BTW, never say never about having children, you would be amazed at the way life throws things at you.