Random thought as I'm about to fall asleep

If Jack Tripper and his female roommates had really wanted to get rid of Mr. Furley, they probably could have done it by arranging for him to overhear what he thought was Jack and one (or both) of the ladies having sex...and then having it turn out that Jack and one (or both) of the ladies actually were having sex. Mr. Furley's head explodes, the building gets sold to a huge, impersonal management company, and instead of a nosy landlord, there's a building manager who couldn't care less what goes on. Then "Three's Company" goes off the air. The end.

(This most likely would not have worked on Mr. Roper.)