My favorite was done by a guy at work years ago. He was over run by squirrels. He made a feeder out of a metal pan. Then made a place for the squirrels to sit on right in front of it out of metal. Cut the end off an extension cord and hooked a wire up to each. Put it in a low tree limb by his deck.
Wired up a door bell button to the other end & plugged it in. He would put some peanut butter in it in the morning & sit on his deck drinking coffee. When a squirrel came to feed, he would push the button. Zap! Dead squirrel. No mess, no fuss.
