I only use lights, and other devices when needed and I'm in the room. At work I'm the one who checks all the doors, and turns the lights and machines off before I leave, so I believe I do my share already.
The ones who piss me off is the offices, businesses and condo's who don't care about wasting energy, who don't pay bills, and waste just for the hell of it. I know people in condo's and rentals, who take 3 showers a day, leave radios, tv's, computers, and lights on all day when they're at work. WTF for?