The 9 pm rule applies to me too. I dont shut my phone off at 9 but I would sure like to. Ok so I am on the right track.
Yes, you are A 9pm shut-off of all screens is good not only socially, but because the blue light interferes with sleep. I make D12 charge her phone across the room so she can't see it if she wakes up at night. Plus it's not tempting that way.