100%. As someone who likes to sleep in the dark and used to travel a lot I can't tell you how many times I would arrive, exhausted at some hotel and then have to spend a further 30mins unplugging stuff, clipping the curtains shut using the clippy clotheshangers and covering every damn light on every thing with a postcard, a postit note, some of my clothes etc, only having to repeat the charade daily after the cleaning staff would "fix" my room and undo all my careful endarkening.
Not everything needs to have a goddamn light on it. Seriously it doesn't. I quite like the feedback that phones have started to do where if you put something on a magsafe charger it initially does something so you know its charging and then darkens itself. It doesn't just sit there glowing like a magical item in some hellish RPG.