I had a BB gun as a kid growing up in the 60's. Along with every other kid I knew. I got it for Christmas when I was 8, and was instructed/threatened as to what would happen if I misused it. My dad used it as a teaching tool to prepare me for the day when I'd be introduced to actual firearms. I never played cowboys and indians with the BB gun, but I did shoot the hell out of the paper targets that Dad tacked to the back fence....the ones that, in my imagination, were rabbits, squirrels, lions, tigers, bears, deer, bad guys, etc.
By the way, nobody ever lost an eye, or even got shot in the ass, for that matter. That wasn't safe use of the tool at hand, and such irresponsible actions would have disappointed my Dad, something which always bothered me a LOT more than the spanking that would have accompanied it.