I think it's important to set rules and stick with them; regardless of if the actions that break the rules are something one would normally encourage during other hours of the day.

As a child, I loved to read at night because it relaxed me (still does), so mom would start my bedtime routine early enough so I could get in at least an hour. I'm not saying she didn't yell at me to turn off the light a couple of times! wink

Hubby, on the other hand, did the whole, "reading with flashlight under the covers until 2am thing". He doesn't think his parents ever realized it.