My worry is that this all happens concerning vehicles as well. There seems to be a total lack of awareness of reversing vehicles in car-parks etc, even when the weather is icy and there's no guarantee a driver can stop IF they see the person who insists on walking behind a moving vehicle.
Then there are those drivers who seem to see the huge space behind your car but fail to realise they can't drive through the 5cm gap until you have moved your car. Mind you, they will try and can't seem to understand that waiting 20 seconds for you to complete your manouver is quicker than the 5 minutes it takes everyone to scream, shout and reverse when they box you in.
What about all the cretins who step into the road and then decide to look and see if there's a car coming?
I think it's a zen thing. "If I walk looking straight ahead and believing that there are no vehicles on the road, then there are none!"
Of course, it would help if the pedestrian crossings/zebras weren't so ridiculously close to junctions.