It's like 11, the kid's been asleep a while, you go to check on her, and the nursery reeks; clearly, only the top end has been resting. When it comes to changing the kid's dirty diaper in the middle of the night without having to re-put her to sleep, we are now 1 for 4. Unfortunately, the first time, I actually managed to get the kid out of bed, change her diaper, and put her back without her even waking up, so my luck has resulted in 3 grindingly sleepless nights since.
The latest--which is why I'm mentioning this now--was Tuesday, when my wife caught a whiff on the way to bed. "Sure, change it," I blithely told her, "I'm just doing a quick upgrade on my server software, if she wakes back up, I'll hear her. We were both up for most of the next five hours. The kid was wide awake, and every time you'd think you'd coaxed her back to sleep, she'd be all, "HI! Go Mommy's bed!"
So I'm not saying you should always leave the poo where it is, just that you should get all the facts on the table befor deciding: because that poo wants you to stay awake all night.