A bit pricey ($2000). Most dumbasses probably wouldn't have enough cash. Good thing too, because dumbasses comprise a large fraction of the population. I think these lasers would only be used by serious hobbyists. Plus the laser tube is two feet long, and water-cooled. So it's not really portable. That reduces the possibilities for injury significantly. However I knew a guy once who, while working on an experiement involving a laser, accidentally directed it out his highrise window. The police showed up a while later informing him that it was shining into somebody else's window a few kilometers away!