Fun at Work?

Sometimes you have to do little things to make work more interesting...and brighten peoples day at the same time. Yesterday the maintenance guys were fixing a ballast at work and they had a few of the lights shut off so they wouldn't get electrocuted. They didn't tell anyone what they were doing though, they just shut the lights off. So obviously people walking through a pitch dark hallway are going to have the desire to turn the light on to aide there travel through the hallway. Someone turns the light on, someone else freaks out, and so on. So, I have this GENIOUS idea to put tape over the light switches. And what do I write on the blue lab tape??? "Do not turn me on!" It made my day a little better, and I'm sure others' too.