My daughter went to a friends house and the numbnut was cleaning his gun right in front of the girls and his infant daughter, she never went back there.
What scared me was people who didn't lock up their guns. People that didn't teach their kids to stay away from them.
What's wrong with that? If the kids know there are guns, and know how to deal with them, where's the problem? If the adult cleaning the weapon knows what they're doing, where's the issue?

If a gun is locked up, what good is it in case of home invasion?

What bothers me more than anything is the irrational fear of an inanimate object, and the ineffective and damaging feel good laws which result.