You make a fair point but I'd be lying if I said I'm entirely comfortable with the idea of a robot armed with lasers no matter how putatively benign its stated

You make a fair point but I'd be lying if I said I'm entirely comfortable with the idea of a robot armed with lasers no matter how putatively benign its stated purpose. It's in my nature to worry about what might happen if one (or many) of these things were hacked.