So why do the holiday makers do it if not constricted, there must be a reason.It isn't constricted in the least... I don't know where you got that impression from; plenty of space in the lane to reverse - cars can actually pass each other in it.
I could understand a sign for obstruction or inconvenience, but a get off my land type of one foot in the grave sketch is wasting money on a sign Imo.
It costs you nothing to be nice. Literally.