I have a very large super-soaker, not just any super soaker, this thing is a water cannon. Two and a half feet of sweetness, and just the right tool in a neighborhood like mine. (full of mischevious bastards)
My house is always a target. Me and my mother take turns chasing off a certain group of kids who enjoy sitting in our nearby park, flinging rocks at our neighbors dog, heckling passer-bys, and trying to break the playground equipment. Eventually, they decided they'd try to give us a hard time by ringing the doorbell at our house and the house of our elderly neighbors.
That pissed me the hell off. My mother called for a police patrol that came up with nothing, and sure enough, they kept up with thier 13 year old bastard antics.
They rang our doorbell five times over the course of two days, and then some, as I came home for lunch one day (a saturday) and spotted one running around the corner of my house as I was pulling in the driveway.
That was the last straw. I wasn't going to have these three kids hanging around our house all day before they got any bolder and started trying to damage the house.
Same evening, I'm sitting on the side of our garage, waiting with a camera and the supersoaker. It didn't take long for them to ditch thier bikes in the park and come sneaking up our driveway giggling like little bastards do.
Around the corner, over the driveway quietly, and to the front door with three backs turned, two egging on thier buddy to hit the doorbell. I let a short whistle, three startled faces turn for the camera, the flash goes off, then the super soaker does it's job. It worked, they ran like hell, and I haven't seen them in over a year. Oh yea, the camera was for proof in case we had to deal with angry parents.
If it does turn out to be stupid kids who enjoy consistently ringing your doorbell, then by all means, get creative. It would piss me off to no end if I have sibings scared because of some damn kids ringing the doorbell.