We went to my mother in law's the other day, had to be a quick trip for various reasons so I was a little stressed out about keeping the charge as full as I could. Plugging in at her home wouldn't have netted enough of a charge to do what I needed but luckily she lives within a block of a pretty decent level 2 charger. She had driven by recently and said there was a car sitting at the charger for most of the day. I drive over to it, and sure enough, there is a Smart EV sitting in the charging space. I look at the charger and it's not running, hit the on button and it turns right off, so I go and look at the Smart car and I can see on the cluster that it's got 100%. Check plug share, no check-in. To the right of the car are 4 handicap spaces and to the left is the entrance to the parking lot. Luckily it was a weekend and the charging cable was plenty long so I backed up were I shouldn't have beside the entrance, unplugged the smart and plugged mine in. I come back 3 hours later about 1030pm to unplug and bring the car home, I didn't want to be a dick and leave it plugged in overnight and the smart car is STILL sitting in the parking space so I left an angry note on their windshield about how they need to be more considerate. I'm pretty sure those smarts only take something like 12 or 13 hours to get a full charge on a level 1 plug and a couple of hours on a level 2.
I'd expect more out of an EV owner. The most frustrating part of this is that most people (like my wife) probably would be too shy or embarrassed to unplug someone else even if they are full. Now I worry that if she ever had to take this trip by herself and actually needed to use that charger, she'd have to contend with this chargehog a-hole.