First job I ever had was as one of those well-intentioned facilities personnel, at the Denny's corporate HQ. First couple of months on the job was pushing a cart around a 40 story office tower replacing lightbulbs and ballasts before adding other tasks-it was meant to, and served a good purpose of helping me orient to getting around the building.
Anyway, there were a few corner offices I eventually set up a little system with: if that office owner didn't want their bulbs replaced, to put a sticky note covering the light switch. I'd come through, check for a sticky "okay, no new bulbs for this manager" and move along. Was a pretty good system until our facilities manager politely asked me to stop and change the bulbs anyway.