Our parents live on about $1200 a month and pay almost half of that in health care premiums. They live in a remote desert town with minimal healthcare services. Our father is 89 and still driving when he probably shouldn't be. They are stubborn and won't take advice. We can't afford anywhere else for them to live and we can no longer always provide the transportation and help they need. They make bad decisions and cause more problems for themselves.
What you can do while waiting for the cops to arrive is block by a car in. This would be a far better alternative messing with someone else's car.
Her. This doesn't need to be your family. Speak to them, be up front. Hope that they can reason. If not speak to primary care physician. Call Your driving agency, report it. The worst thing is to do nothing!
Unless they're on self-destruct mode let them make their own decisions and live their lives as they choose. At their age, the last thing you need is someone telling them what to do.
So, like the 911 confusion, there are many things your parents dont understand - in their defense it IS confusing - someone in the family really needs to get the facts and advocate for them. It might save an awful lot of mis steps and pain for them and you!