Ever do this? I heard about it on the radio a few years ago.
You find some images of ghosts which you can print and cutout, then pick 2 neighbors and leave some treats on each of their porches along with the ghost cutout and a poem that says they now need to Boo! 2 other neighbors. Ring the doorbell and run. They're sposed to hang the ghost image on their door to show they've already been booed.
Methinks such a thing should be started on October 1st to usher in the month of Hallowe'en. See how many houses in your neighborhood get hit by the 31st.
Or you could be a bit more mischievous like me and do the Flaming Bag of Poo thing
