You can easily put the gun somewhere safe. The lock does not need to be on the gun itself. Requiring fingerprint locks on all guns would increase the costs of guns for everyone when I would guess that most gun owners wouldn't want the feature (unlike airbags). Also, if you have children in the house, they should be taught gun safety and that if they even touch any gun without your permission, there will be hell to pay. Hell, they should probably be taught the same even if you don't keep a gun in the house. In any case, if I was going to use an electronic lock, I would much rather use a RFID lock over a fingerprint lock. There would be a much smaller chance for error.