I had 4 nine hour flights in august, they really dont care if you let the baby go up n down the aisle, lanna was crawling, there was no keeping her still lol , i just kept an eye on her, and if she darted somewhere would get up n follow her, but nooone cared, and she was actually to shy to go further than where my brother was sat on the plane! (like 2 seats up lol)