Nobade,
" Anyhow, if that rifle had had a safety and it was used when the other fellow was trying to jack the rounds out of the magazine he might still have a useful leg now. Small price to pay for a slightly ugly lump on the side of your rifle. Don't like it? Don't apply it, nothing changes. Want to unload the magazine? Apply the safety and go right ahead. Just something to think about."
The rifle already has a very satisfactory half cock notch. The safety is in the hand of the operator. In your scenario, had the rifle been pointed in a safe direction the negligent discharge would not have shot the other fellow. Also, why run the ammo through the action? The cartridges come out through the loading gate quite easily.
Regards,
Dan