Sometimes I'm even the 'mean Mom' who physically removes all new reading material from his room late at night so he'll get some sleep. (But only when he's been really tired and I can tell he's been staying up too late reading.)
I have thought about doing this, but I was afraid that was too severe!! I sit in the hallway until my kids go to sleep(anxiety issues), but it also allows me to make sure DD10 does NOT read. The minute I go to the bathroom or downstairs for something, she is out of bed and grabbing a book to read (or pulling it out from under her pillow!!!).