Outside of possibly trapping your wascally wabbit and relocating him, you might as well sign a peace treaty with said bunny - don't think you will find something that works((
I saw something in the totem flyer yesterday that looked like it could work. It was a motion activated sprinkler. You could set it up to blast anything that crosses its path. It even mentioned something about being good as an animal detterant.
I have some idiot kids on my street and that sounds like it could be entertaining for me!!! The pressure would have to be AWESOME!!