Ha ha...well, it's not a real cable for guitar players to use, but if you know a frigging hack who needs a "jolt" of inspiration I could see it being handy for that.
It's actually wired to the hot/neutral?!? I could see wiring it to ground only, as a joke, but that thing could kill someone! Or more likely someone's kid. Can you say "lawsuit"?
Or do you mean you have three like that, that you made yourself for your intended purpose?