@a_onekatie just chill please. People make mistakes and people need to be responsible for their own safety. The onewheel is not a “safe” thing to ride no matter how much protective gear you have on. If you think everyone should be responsible and as safe as possible then no one would go outside... and even then they would be at risk.
It’s good to set an example for others, but we can’t be held responsible for others irresponsible decisions.
144 miles -- I've only had three crashes -- no broken bones. They CAN be ridden safely. Just many people choose not to. Know the board, respect the board. Know the boards limitations, respect the limitations. Know your skill level, respect your skill level. Know your limitations, respect your limitations.
Part of my doing that, I've downloaded an app to an old cell phone, that's goes in a joggers pouch on my arm. Has a customization "max" speed alarm that I've set at 10 MPH. Anything in my path that looks questionable for my skill level -- I stop and walk the board across if I can't go around it.