“Wait until they get inside before driving off.”
Absolutely, this applies to people even if they haven’t been on a date.
These are just good manners, what happened to those? Have they gone totally out of style?
Yes that is just basic common sense. My Father worked at Eglin AFB which was 24 miles away. He worked shift work and they always arranged for two from the same place to be on the same schedule so they could car pool.
I noticed one would always wait until the other was inside his home before driving off.
It is common sense to watch out for others and see they get into the house, no matter who it is. A book on good manners could be a valuable teaching tool for many.