some of them are depressed, angry, impatient people who thinks(wrongly) that mutiple pressings will make it quicker. is this a predominantly female problem? i have asked a 20+ women who did the multiple pressings at a pedestrian crossing whether it would bring the 'green man' come earlier. she said 'dunno'. not surprised at all. she turned out to be my neighbour, luckily not on the same floor.