I think I would take the same advice as is given for someone handling a gun -- treat every gun as if it is loaded. Treat every wire as if it is hot. Unless you

I think I would take the same advice as is given for someone handling a gun -- treat every gun as if it is loaded. Treat every wire as if it is hot. Unless you have a really good reason not to. Not doing so is putting an awful lot of trust into a potentially large number of people that you've never even met. Because you just don't know what some idiot has done...like the guy in the video.