Autonomous vehicles (AVs) — Waymos, in particular — are trundling their way around cities like San Francisco, Austin, and Phoenix like so many overly cautious teenage drivers. While they're well on their way to becoming just another piece of sorcery rendered unremarkable by ubiquity, there will be bumps along the road. Assuming the operational model remains a vehicle-for-hire, AV operators will have to deal with all of the messiness that comes with having human beings as customers.