Because if I’m waiting at a crosswalk, what other signal of my intention do you need? Conversely, if my dogs are sniffing and taking their sweet time, I turn my back to the street so drivers don’t think I’m crossing. But if I’m standing there facing the street, what else am I going to do when you have to stop for a light or stop sign?

And a link to best-practices from driver’s ed is hardly indicative of how people actually act.