[zozbot234]

People underestimate kids in some ways, and overestimate them in others. The underlying framework for highly abstract thinking takes time to develop, as does the ability for understanding empathy and moral behavior. A five-year-old kid literally has no notion that driving a car he's not the owner of is theft, and thus grossly unethical conduct. The car is just there for the taking; to him it's no different than playing GTA.

[TomMarius]

5 year old kids are capable of very complex ethical thinking and empathy, most definitely including understanding of ownership. Maybe it's not as common in the US, but you can see it clearly in any country where kids regularly go to child care from age 3.