(Video Link)
Kurt Grandis was plagued by an endless offensive of squirrels against his birdfeeder. He needed a solution, so he programmed sensors to detect the shape and color of squirrels -- and only squirrels -- then instruct a Super Soaker water gun to shoot them. Skip to 16:00 to see it in action.
-via Boing Boing
Exactly. That is why they made .22 - perfect for the job.
Not too far from programming sensors to detect the shape and color of humans. The British have already made a Skynet, there's the creepy robot hand earlier and now animal sensing technology. We're just daring the machines now:)