Nsweezie,
It sounds like Bandit needs to become an indoor kitty. Sometimes, especially when cats get older, they begin to lose their sight and/or hearing.
How friendly are you with your neighbors?? If they take a "oh well" attitude, is it possible for you to take Bandit in?? He'd probably be very greatful and finally safe. And I also think a trip to the vet might be in order to see if there isn't some other underlying problem.
As far as approaching them is concerned, maybe one day when you see them working in their yard, just go over and casually mention Bandit and what the problem is. They may not even be aware there's a problem.
Good luck and keep us posted.
Donna
Bookmarks