Barnabas hates Jeff so much. Jeff is such a crybaby. If you say what he doesn't want to hear, well, he goes crazy. Ranting and raving. Every time I see Barnabas and Jeff, I'm trying to send telepathic messages to Barnabas, so he would kill Jeff. So far it hasn't happened yet.
Willie on the other hand is just going to take that rifle, and shoot Joe. Like "Dirty Harry" movies, Willie would get on top of the old house, after he had sent Joe a note from "Barnabas" asking him to come over. Then, BANG!
Then I figure, Willie would have to send Clint Eastwood a thank you note, for the idea, and ask him for an autographed picture.