I say this as a parent: we tend to tune out our children's behavior since we often compare it to the behavior of other noisy kids or to our children's behavior at home. We think "Wow, she is a bit fussy, but way better than I expected." However, OTHER adults don't feel as kindly as we do and are probably annoyed much more easily. While I agree that WDW is partly for kids, it's not only for kids. In decent restaurants where an individual may be paying $25-40 dollars for a meal, he or she may well expect that your whining child be taken outside until the problem is over. You may have perceived your child's behavior as normal or okay, but if it's clearly bothering another person, then maybe the child's behavior isn't as unbothersome as you think. Clearly, this woman could hear it over the noise.