"Air is a public highway" Supreme Court ruled in 1946. Maybe it is time to consider a minimum altitude, which must be obeyed outside public areas? Something lik

"Air is a public highway" Supreme Court ruled in 1946. Maybe it is time to consider a minimum altitude, which must be obeyed outside public areas? Something like 300 or 1000 feet depending on local conditions (building height, terrain etc). Would that make sense?