If you have nothing to do, why not trap a villager that you don't like? I took one and dug holes all around it (he escaped, but I pushed him back in) and now he's trapped. I also dug holes around the front of his house so he can't go back in. Everything will return to normal if you save and quit, though... If you're really feeling evil, pull out your net and hit'em up! Muah hah hah hah!
