The trouble is people will not accept change sometimes unless you force it upon them. I tried putting timers on the light switches in classrooms once for a test. It only took the users a couple of days to bring in electrical tape and tape the timer switches in the on position so they would never shutoff.
Next I tried using motion switches to shut the lights off when the room was not occupied. So the students and the instructor would practice setting motionless and see how long it would take for them to make the lights go out.
Some people never get it unless it is forced upon them. Saving energy and money are very important goals.