With sufficient data, I'd expect self-driving cars to be better at predicting what such leans mean. Moreover, for every one human driver who notices such a lean, there may be another human driver that doesn't even notice a pedestrian who has already started walking.
This comment seems unnecessarily hostile. But, still, I'll change my previous comment from "there is" to "there may be" so that it's clear that I'm not claiming any data. Just guessing (reasonably, based on experience).
