You should probrably read more about safety before building a laser such as this.
I agree, this is a dangerous object no different than other dangerous objects. Anyone of sound mind can safely operate it and has a right to own it. It's not much different than a 30 dollar pellet rifle you can buy at walmart except it ricochets 100x worse. It is NOT a laser pointer. It's a device with very limited uses and lots of required safety measures because of its power. It's ALL about your perception of it.