My kids get to control their nightlights all by themselves. I trust them to do this responsibly, if they're clever enough to do it so I don't notice then I'll let them get away with it. I don't feel the need to snoop on/control my children digitally.
I think it depends on the age. This started several years ago to give my 4 year old an "ok to wake" light, which helps considerably with sleep training.
