I don't know if this is true everywhere, but in my city in the US, cars are supposed to stop at crosswalks (not talking about at intersections necessarily) if a pedestrian is crossing even if there is no stopsign or signal beyond the white paint on the road, but this is NEVER observed in my experience. Thankfully it seems like most pedestrians don't know this either so we don't get people trying to challenge cars to make a point at risk of their own lives.