All good ideas, but with my experience with my own local crazy old lady....she NEVER goes anywhere or leaves home! She's watching all the time, and doesn't hesitate to call the cops anytime the spirit moves her. I used to have a friend who was a dispatcher at the local PD, and she told me that the cops routinely blew off the crazy lady's complaints. It seems if you cry "wolf" too many times, nobody takes ya seriously.
I keep hoping she'll die of old age someday, but I think the witch will outlive me!