That is super interesting, thanks a lot for the detailed comment! I wasn't aware that sign language is not directly translatable to text as are other languages.
Sure, if it was just a couple of them it would probably be fine. But the problem is that in many cities the amount of scooters that are left in random places gets annoying. I think that having designated parking locations would be the best solution and, as long as you have enough of them, that should not impact their usefulness.
I don't think it does anymore. Perhaps some films still have better dynamic range compared to cheaper cameras though.