Shooter, are the tree huggers the only reason you can't shoot them, or are there actually laws prohibiting it? Because if it's only the tree huggers, it doesn't make sense that you want a trap that will kill the squirrels; the tree huggers will be upset anyways 'cause the squirrel is dead. If shooting them isn't against the law, I'd have to advise you to forget about the tree huggers, shoot the squirrels cause they're yummy, and if the tree huggers holler just politely inform them to stay out from in front of the barrel.

Brandan