If you use a fish shocker from an aluminum boat, are you at risk of getting shocked yourself? Actually, fish shocking isn't quite as horrible as you might think, and I believe legal in some countries. The shock is meant to stun the fish, not kill like with explosives. Nor does it effect every living creature in that particular body of water. I don't remember the particulars, but it was on some PBS documentary a while ago. I'd guess that it would sort of depend on the equipment and implementation, as to whether its a good or bad thing. Wouldn't require a considerable wattage to kill the contents of a small pond or pool anyway? Something powered off a car battery isn't likely to have a huge impact, like explosives.