Carry on until told to (or they physically can’t get into a car)
A couple of years ago my wife was sitting at a little junction in an Asda car park, the back of her car was obscuring the space she had just come out of, not enough space to get past her and parked. A woman in a Micra decided she wanted that space and attempted to drive through the boot of my wifes car.
When the other driver got out my wife said it was like Yoda trying to find his walking stick. She had no idea what had happened and blamed my wife for not moving out of the way so she could get to the space.
I phoned the woman later on that night to exchange insurance, when I said to her i was phoning about her hitting my wifes car she said “oh no, I haven’t hit a white car today, i think it was blue” (it was silver) From the conversation we had it sounded like she did this quite regularly.
Unfortunately as people get older they become less and less aware of what’s going on around them, when they’re navigating through towns in 2 tons of metal and glass and they don’t know what day of the week it is, then they have to be regulated.