Considerations
The absence of a driver in vehicles capable of full autonomy might tempt some parents to allow children to travel alone and unsupervised. Consider a junior high school student who starts late for band or football practice. If a parent is running late from work, it is probable they might consider having a rideshare AV pick up the child. Parents might perceive this situation to be safer than using conventional taxis or other public transport, in which a child is alone in a vehicle with an adult stranger. Children, across all ages, is another matter, without some form of communication between the child restraint and the car.