It is dangerous to hold up traffic in an intersection by J-walkers.
It doesn't take alot for someone to let a car go by, does it?
A car is a dangerous weapon that can kill someone, just like a gun. Walking in front of a oncoming car, is like walking in front of a loaded gun. Think about this.
What would happen if the brakes on a oncoming car goes out? or, the driver of the oncoming car can't stop quick enough? Who's fault is that? So, why take a chance and blame the driver, when that's the j-walkers own ignorance.
Better for the car to go by and be safe than sorry.