I'm also a photographer and I used to have my own darkroom here at home. I used film and enlarger, so a lot of things I used are NOT to be opened unless the room is dark. Each container has some kind of lock, but I used to put a masking tape over it.
One reason is to slow me down just enough to THINK. Exactly the same reason suggested by Cerebus. It was amazingly effective.
Yes, I'm trying to protect stuff from myself. My spectrum analyzer has two ports. One is DC protected and the other one is not. More than once, I didn't catch myself until the last moment. So I was looking for similar slow me down device. If I burn an attenuator or an input amplifier, it's basically toast.