My mother only has three rules for story-time at her local library, and she implements them firmly. As a life philosophy, they're not too bad either.
1. If you sit in front, you have to sit flat on your bottom so that others can see.
2. You can't walk up or down the stairs any faster than the person in front of you.
3. You don't have to pay attention, but you have to be quiet.
I mostly have problems with that last one.