while you're correct, *everybody* feeling like they are helping by turning off a light would actually amount to something, a fraction of a fraction though it may be. i don't go out of my way but i do buy energy efficient tech where performance doesn't matter, set up my desktops to go to sleep after an hour or so (they way i use them it doesn't bother me), use a raspberry pi as my server etc. at worst i'm making bugger all effort to make my power bill cheaper.