One of my friends -- who happens to be a perpetual worry-wart -- is so concerned about safety and electrical use, she unplugs everything when she closes up. I mean everything: the drill press, lights, chop saw, claiming that leaving them in the 110 outlet uses up electricity and presents a safety hazard. OK, I understand battery chargers, because they have a transformer, but all those other tools don't draw a microamp unless they're turned ON.
OK, I know that there are exceptional situations (shorts, etc) that could remotely be a factor, but it simply isn't worth the stress and bother to unplug and replug every day.
So, chime in and settle the debate.