This couple that was in the same train as me, left their seats to change the diaper of their little baby.
Not only did they go away from their luggage, but they left two phones and a large tablet visible and unattended for quite some time!
I have a family in a village like that. But I don't know if that's still the case.
First it was uncle chuckling at my dad when he locked his car.
Then a neighbor came there telling my uncle his (uncle's) car was in front of his gate, and he wanted to leave with his car.
Uncle told him something along the lines of "Eh, sorry, just re-park it elsewhere."
After being asked by my father, yeah, the keys were "of course" inside.
Apparently nothing unusual.
But it's been years.