Honestly, I think this is what we have to do as pedestrians: Assume that drivers don't know what they're doing.
Even if it's my light, I never step onto the road until I see that traffic has stopped.
When it comes to pedestrian/vehicle interactions, being right isn't as important as being alive.

That being said, pedestrians in downtown Toronto really push it (crossing well after the light has turned yellow, jaywalking, crossing where they shouldn't, etc).