Thanks for further explaination. More question - how to define a recklessly or careless driving on a track / circuit when an accident happened? Real car race have a group of judge on site but how to define it when people playing a toy on the playground? Just friendly discussion, not a challenge.
My preference is that no matter other people have intention or careless or no intention on their driving, we should stay alert on our own safety instead of thinking others are bad guys or not. Be proactive to protect yourself is always far better than rely on people who don't know.