Am I a jerk for unplugging this guys heater repeatedly?

I work for a commercial cleaning company. In one of the office buildings I clean, there is a guy who often leaves his little space heater on under his desk. It's happend about three times last month. Once on a Friday, so it would have been running all weekend. I think I know how to shut it off, but I just completely unplug it, just to be safe. I havnt gotten any complaints telling me to stop unplugging it. Also, it's a fire hazard. I was thinking of having my boas email the company to talk to the employees about Turning their heaters off.

Am I a jerk for unplugging this guys heater repeatedly?
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