If the hidden gun in the closet is locked, as in a safe, then even if the kids find it they will be hard put to access it. Same for thieves.
Think of a speed vault safe sunk into a sheet rock wall and covered with a full length mirror. Or the same safe with a coat hook above and a old sweater hanging over it.
And if it's there for those times when you hear a noise at night, and your closet is 'tactically' set up so it's easy to find, it works well.
"The government has confiscated all of our rights and is selling them back to us in the form of permits."