Friendly Fire
One of the main reasons I don’t own a gun is that I think the potential risks outweigh the potential benefits. I never want to accidentally shoot myself or a loved one. (I would, for those wondering, probably be willing to shoot an intruder in my home, which is one of the main reasons I’d consider owning a gun.)
But, someday we’re all going to be “chipped” with RFID (or similar) tags that our home recognizes and uses to turn on lights when we enter the room, lock the doors when we’re gone, and do all manner of wonderful things.
When this day comes, I’ll invent or buy a gun that recognizes my chip and the chips of my loved ones and refuses to shoot at them. Foolproof? No, I don’t think any system is really foolproof, but it would decrease the danger of accidental injury, which frankly is pretty small already, since we rarely if ever hear about someone accidentally shooting themselves.