For those who want to be amused. We have one of these and it is hilarious. The squirrels do back flips:
http://www.yankeeflipper.com/droll/index.cfm
Yeah, that's one I was looking at the last time I was at the Wild Bird Store. The lady said they're very effective, and it would be harmless entertainment seeing the little buggers flung to the ground. I watched that video on that link before. It is hysterical.