Stepped out of a coffee shop, got text from wife, grabbed my phone and got missed by inches by a kid on a scooter easily doing 25mph on the sidewalk. The text possibly saved my ability to walk in future by having me to pause just for a moment.
On the other hand, kids have always been stupid. We've just given them new, more powerful ways to abuse that lack of awareness.
Automobiles for 16-year olds have been around for a very long time.
Anyways, it's quintessentially American to be talking about oversized landship SUVs and trucks killing people, only to have someone derail it into kvetching about kids and bicycles.
I see the appeal in trying to ride fast, but it gets kind of scary. When I rode a bike I went fast outside the city specifically to avoid pedestrians.