DEAR MISS MANNERS: I own a battery hybrid car. As these types of cars become more popular, there has been an increase in the number of publicly available charging stations. These stations are typically found at places of business like malls and commercial parking garages, and often (but not always) line up with a designated parking spot.
I have occasionally come upon a car parked in a charging space, and plugged into a charging station, although it is completely charged. (This can often be determined by indicator lights on the vehicle or on the charging station itself. Typically when they're lit and/or blinking, the vehicle is charging.)
I don't want to waste time waiting for the car's owner to come back, or to have to return at a later time to plug my vehicle in. Would it be rude to unplug someone else's vehicle if I "know" that it is already fully charged -- assuming that the cable can reach to the next parking space?
GENTLE READER: Much like the use of public laundry machines, it is difficult to determine exactly how long this process will take -- and tedious to sit there waiting for it.
Miss Manners asks that you assume the best, but if you are forced to wait an unreasonable amount of time, she will allow you to change out the plug. If caught in the act, you may say, "I am sorry, I didn't want your car to overcharge."
While this may betray some ignorance of how the system works, at least it will have the guise of being thoughtful and polite -- not just impatient, however justifiably so.