Walking into traffic in an undesignated crossing is rude (and illegal). Likewise with trying to cross at an intersection when traffic has the green light.

But when there’s a designated crossing area, it’s the responsibility of traffic to stop. Pedestrians should not stand and wait at the intersection for a break in traffic because it’s a confusing signal to drivers. If you’re standing at a designated crosswalk you need to be either signaling your intent to cross or moving away from the crosswalk