I might quibble on the definition of "technology". For instance, yes, a gun is a tool designed to kill a thing. Some guns are specifically designed to kill pe

I might quibble on the definition of "technology". For instance, yes, a gun is a tool designed to kill a thing. Some guns are specifically designed to kill people. But the technology of gunpowder propelled projectiles has peaceful applications. For instance, one of the early uses was to propel a rope to distressed boats and ships so that passengers could be rescued. Likewise with the hypothetical device you have described. Sure, sounds terrible. But what are the underlying technologies it is built upon? Unless you've tapped into some sort of fundamental evil force of the universe, there are probably some pretty awesome technologies involved, that would have peaceful, useful applications in another device that wasn't so awful.