You're way overcomplicating things. Uber already handles this kind of stuff. Driver gets paid on the person who threw up's dime ($50-200), driver is responsible

You're way overcomplicating things. Uber already handles this kind of stuff. Driver gets paid on the person who threw up's dime ($50-200), driver is responsible for cleaning it up. It'll just be a centralized maintenance hub instead of the driver. You won't get dinged unless you consistently get reported, because Waymo (like Uber) will follow the Amazon model of customer-is-always-right. These are all solved problems.