Yup, its definitely a dicey issue. 5-10 mph on a skateboard is definitely a courteous and safe speed.. The problem is that 12-20 mph is also attainable and unfortunately not everyone is as courteous as you. It's the bad apples that spoil the bunch.
Yes, I do extend this to rollerbladers and scooters. Segues have a maximum speed of 12.5 mph and restrict their own downhill movement. I'd say they're sidewalk safe. Same with wheelchairs.
If there was a way to limit the speed of the board based on the grade of the hill, that could be an easy, innovative solution. I imagine that might be built in already to some degree.
Yes, I do extend this to rollerbladers and scooters. Segues have a maximum speed of 12.5 mph and restrict their own downhill movement. I'd say they're sidewalk safe. Same with wheelchairs.