I've had people bring rifles and handguns to me for repair or accurizing, placing them in a gun case that had been in their relatively damp basement, then in the car trunk in the hot sun.
It only takes a few hours under those conditions to leave a thin layer of rust over the entire gun!!! No; don't store guns in gun cases unless you're sure ambient humidity levels are under 50% for the entire time and there are no wide variations in temperature.
People are like rifles. Some are tried and true, having great eyes, personality, and fun to be with. Others never seem to hit the mark with you. Still others go off half-cocked. Still, it's nice to know most of them.