I borrowed your post as an illustration but all references to "you" are the generic, all encompassing you. So when you leave the port open and a note on the cord asking the other person to plug your car in do you also leave your number and ask them to text you when they do? Then you'd know about when to go back when your car is charged. If not, you'd maybe have to make several trips back to check the status of things or risk leaving your car plugged in long after the charge completed?I haven't yet encountered that situation, but if I pull into an adjacent space where someone is already charging, I plan to just leave my charge port open and a post-it on the charge cord handle. In that situation, I imagine that just about any EV owner would appreciate the gesture of having their car plugged in for them. It seems almost like common courtesy to me.