What's your point? I'm 99% sure that even on a single track road if you use the turn signal, the car won't complain when it thinks you are leaving your lane because it will understand that it is intentional.
Sure, you might confuse the other drivers, but your car will be happy.
I agree Tesla should fix whatever bug is causing the off setting to not stick. I'm just saying that using your turn signal is a better solution than taping a photograph in front of the cars camera.
Just following up on this, I drive in the US a lot and there aren't so many roads like this there (except in country songs). Many of my leftpondian friends that come over to Scotland get spooked by roads like this, but in a nice car with good observation and control, they are wonderful to drive on. OK, on a blind bend you have to slow to 10mph or less and sound your horn, but when it opens up, it's amazing! I don't want my car bleeping and stressing when I'm trying to enjoy it (I get my M3P next week so no experience of what it does), though I would of course like the option on highways and "real" roads.
Point is, there are no other drivers in this scenario (and if there are you drive to that), and of course the photo-in-front-of-camera is a joke