We just had one of those in a really good neighborhood here in town. Woman rings the doorbell, someone cracks the door, woman asked if they had a gas can, and then 2 thugs in hoodies with guns come around the corner, crash through the door and hold the people in the home hostage while they steal everything they want. All caught on a Ring doorbell.
Motto: never open your door to a stranger even if it is a woman.
I always answer my door with a loaded pistol in my hand.