[RWebb]

"some old man"

- I think that is the key. He is too old to drive. Try to get his plate and/or ID and see if the DMV can force him to take a driving test based on your complaint. It is really for his own good. We are all going to get there sooner or later...

Also, see if you can meet his kids or younger relatives and have a very nice, friendly talk with them -- for his own good.

He will resist the familiy's attempt to "take away his freedom" and yours even stronger. But...

I took away my mom's car a few years before she died - with her full acceptance.... until she realized what it entailed, then you'd have thought I was selling her off into slavery.