Actually I put "real" locks on my house, i.e. sidebar schlage because I realize how crappy a home depot grade lock set is in terms of direct forced entry or picking.
How small of a child can disable a IL Smith? I don't know, but I don't think responsible gun safety at home should be predicated on more than just the thought that your kid can't figure a way to turn that little nubin. Promoting that as "safe" is unsafe in my opinion.
Furthermore, and again why saddle everyone with that... if it is something you want, great, not everyone does. Time to stop the group think, one solution for everyone stuff in this county and let people make choices and take responsibility for what follows.
Furthermore I find it really funny whenever people argue pro-lock to imagine what this conversation would look like in say 1982 when what 85% of American law enforcement had Smith revolvers in their holsters. I know tons of guy from this era who to this DAY will not carry a semi-auto anything, 6 for sure in their mind trumps anything anyone can say about anything OTHER than a revolver. I have a have a world of respect for these guys and can jsut immagine telling them guys you want to add some useless or seldom used bits to their gun that might lock the action. This would have never flown back than, so why is the safety and reliability of a gun I might buy any less important?