I wish they would limit the speed of these disabled motor things to an normal walking rate ie 3 miles an hour. The number of times one's gone whizzing by me with some geriatric incompetent on board with no thought to life and limb is frightening. I was out with a work colleague a while back in a shopping mall, and one, going at a fair old lick, banged into her leg. She screeched in pain and stopped to examine the damage. The driver gave her a filthy look and remonstrated with her for not being more considerate. "I'm disabled", he shouted. Now few drivers of these things are so rude but a great number seem to be every bit as idiotic and dangerous.