If you give someone a ride home, or walk someone home, don't leave or drive away until you see them get inside and close the door behind them. Make sure you see to it that they get fully get inside safely before you leave.
This also applies to temporary residences, such as a hotel, airbnb, dormitories, ect.
Seeing to it that they fully make it inside safely isn't just about fear of something as drastic as an assault or a mugging. It would also be awfully annoying and stressful for them if they lost their key, and before realizing they're locked out their ride or walking companion has already sped off, so now they're stuck outside alone with nowhere else to go, and possibly a dead phone (when it rains it pours). Or maybe there's dangerous fauna in the area. Or maybe the neighbor's poorly trained dog with aggression issues is loose. Or maybe they slip and hurt themselves while walking to the door.
Even if you're absolutely positive they'll make it to the door safely, it's still a kind and thoughtful gesture to let them know that you care enough about their safety to see to it that they make it inside safely.
This is a thing my mom trained into me (also: second-to-last car to leave an event waits for the last car to make sure both can turn on and start driving home).
It's not exactly that I judge my friends who drop me and go, but I do always notice which cars stay until my front door is actually open. And on my end, it means sometimes I will get out my keys and clearly jingle them as I'm walking up the steps, as my own signal to the driver that I'm good.
Community is good and this is an easy way to make me feel loved.
