Just a quickie . . . . yesterday a chap arrived at a parking space in micra-sized car (the older small version I mean, not the new monster). I could hear his reverse alarm from where I was sat, on the wall, having a quiet ciggy. Without once looking round at where he was going, he started to reverse - steadily the BEEP became more insistant, and then 2-foot from the bumper of the car behind him the alarm's beeping became a single (warning?) note. He plonked back into 1st gear and drove off, still never having actually looked at the parking space (which he could have got into).
Absolute, total, unfailing belief in a crappy piece of technology.