It is sooo frustrating to see human food being taken by critters. Squirrels are actually kinda smart. We live trap them, and release them out of town, but you have to take them on a pretty long ride, or they'll find their way home. I didn't believe this, but an old timer told me once, "spray paint their tails, and see if they come back after you take them to their new home!". I'll be hanged, we did it, the squirrels with the blue tails came back after their 5 mile ride. This was 5 miles as the crow flies, now we take them out quite a ways, usually about 20 miles out. I used to just shoot 'em, but my wife just doesn't like shooting them, since we don't eat 'em. They have to be taken care of though, they can be very destructive.