Hi Sean,
Met an Australian couple up on the Positano Bus Stop and naturally started up a conversation. They were looking a little stressed and after a bit of prompting, told us the story.
They had arrived in Naples the previous day, picked up the hire car and headed off for Sorrento...doesn't sound too hard (I had planned to do it myself, but was advised not to by a friend)....within a few miles they had lost one side mirror and picked up a side scrape from another vehicle squeezing into a non-existent lane.
By the time they got to Sorrento they had another dent, the other mirror hanging by a thread and were nervous wrecks.
They parked the car, locked the keys in it, and rang the car rental company to come & collect it.
I understand what you are saying with the people, we found some in Rome a little "full of themselves" but wouldn't let them get away with it (by using a bit of humour), and we got on well. Positano people were simply fantastic, probably helped by the fact we knew someone who lived there.
We were walking through Amalfi when someone stopped us to compliment us on the wedding.....we were stunned....but then I guess they are relatively small communities and everyone knows who is up to what!
Cheers
Grant