All power tools, and many manual tools, are dangerous in the wrong hands. Jack hammers, sledge hammers, regular hammers, skip loaders, manual loaders (aka shovels), picks, power saws, manual saws, belt sanders, orbital sanders, hand-held sanding blocks, all have the potential to do real damage. In my teen years working on landscaping crews, I saw somebody do alarmingly dumb things with each and every one of said implements. And yes, in a couple of instances, I was the "somebody."