I let my cousin & her husband drive my car when they need to, as they don't have one. All I ask in return is some gas and some consideration.
I don't like going out to my car to find all the windows rolled down and the car unlocked. I keep my purse in the car (out of sight, on the floorboard) because I'd forget it otherwise. The folks down at the end of the row have already shown a predeliction for stealing my stuff.
I've got power windows & locks, so it's not like I'm asking for a lot of effort.
Still doesn't beat the time they not only left it unlocked with the windows down but left the hatch up as well. (Thankfully, my stuff was in the house that time.)
I'm also not too happy (with myself) that I forgot the HEB bag in the car and the frozen breakfast sausage--an all-important protein source--was out there for several hours. Morning sickness has hit in full-force, and it makes my brain fuzzy.