Yes, but not just if children are harmed. I believe that as a gun owner, I am responsible for my gun and what it does. Therefore when it is not under my control, it is secured...properly secured.Should Owner's / Parent's be held accountable when children are killed?
I honestly believe that a gun owner who permits their gun to fall into the hands of an individual who should not have access to it, either through negligence or stupidity, that the gun owner is equally responsible for whatever consequences may result. Meaning that if one tosses their gun in a night stand and heads off to the office, during which time the house where the night stand is get robbed and the gun disappears...it's on the gun owner for being so bloody stupid.
I don't believe that cheaply made POS lock boxes and trigger locks satisfy that definition of "properly secured".
It's kind of long and really pretty annoying, but the linked youtube is also worth the pain to get through. One comes away with a healthy respect how unbelievably bad, cheap, useless most lock boxes are.
DEFCON 19: Safe to Armed in Seconds: A Study of Epic Fails of Popular Gun Safes - YouTube