In our county, parents are supposed to be waiting with their elementary school kids at the bus, and they are supposed to be there in the afternoon when the bus drops them off (per county BOE rules). If no parents are at the stop, the bus driver is instructed not to let the kids off at that stop. I don't know how frequently that happens, or if the bus drivers follow that directive.
Where does the bus driver take them if there is no one at the stop? This seems a little like too much government to me.