I think it would be a great idea to give an option to turn off the little indicator light so as to not tip off a sneaky person if it’s in or not.
There is an option. There’s a toggle in the battery compartment. This is listed on like page 3 of the manual.
This should be a software option, not a hardware switch.
It’s handy to use it when testing. But it really is a mistake to have these blue lights alerting the presence of the camera.