I've got a good one about that 1981 Rabbit convertible. I had it parked in front of my first "grown-up" apartment with the top down and the keys in the floorboards. The top was broken, so getting it back up was a two grumbling person job and most of the time it was easier to just leave it down. But that night, it started raining into the car. No matter, though, because with all the rust in the floor of it, it wouldn't hold water anyway.
Apparently some enterprising thief happened upon it, saw the keys in the floorboards, and thought it would make a good ride for the night. However, he first had to get the top back up (this is how I knew there was an accomplice). The first thing I'm sure they noticed once they got going was that the passenger seat back was broken and propped up with an igloo cooler at an awkward angle so you couldn't really 'sit' in that seat but you really didn't want to anyway, because one of the roof leaks was right over about where your shoulder would be.
When I got up in the morning and saw it was gone, I called the cops, incredulous that anyone would actually steal such a POS. The cop got there about 20 minutes later, heard my description of the car and said "I've seen it, hop in my car and I'll take you to it." I clocked it later, the car had been abandoned 3/10ths of a mile away, with the keys again in the floorboards, the top up, and nothing else touched.
Forevermore that car was known as the car too crappy to steal.