User blog comment:RubbadubbersFTW DoraFTL/Peeing and pooping in diapers becomes bad behavior?/@comment-3969350-20170705221916

If they do it on purpose as a reaction to someone disciplining them, then yes, it could be considered misbehaving. If it's an accident, then it doesn't count. Basically, it's the equivalent of threatening to pee and poop in one's pants and then doing it.