I've been spurred into setting proper passwords, but I doubt that would stop the serious geeks.
I used to turn the old router off with the rest of the kit, but this Motorola takes an age to fire up. The technician that came round to tend to something said most people leave them on 24/7
I often go into people's houses and see dozens of LEDs glowing away. They happily go away for weeks with all this kit left on.