Re: Wait a minute...
Already happens in a town I drive through - even though there might be a zebra crossing, lights controlled pedestrian crossing juts a few yards away, people will blithely step into the road.
With the mass of lights / zebras in that town a car never gets to much of a speed before it has to slow again so it's a similar scenario to the 20 MPH zone werdsmith mentioned.
So, knowing the cars are not travelling particularly fast (& so a good chance even a massively inattentive driver might notice them / impact will not be fatal) people just happily cross wherever they want.