I have an old Remington bolt action .22 rifle that fires (without engaging the trigger) when I close the bolt about 1 out of 5 times. I discovered the problem while it was pointed down range thankfully. It was a malfunction of the firearm that had nothing to do with keeping my finger away from the trigger. For fun, I finished a box of ammo with the rifle just to see how often it would malfunction. I suppose you could say that I was negligent for not realizing the rifle had a broken part, but even afterwards I could not spot a problem with the parts (though I am sure a gunsmith could have).