I was told by a cast member that the a "quiet" pool is really just a way of saying that there is no lifeguard there. I agree, it is a misnomer. We particularly enjoy one of those pools at OKW, and my husband and sons do enjoy tossing a ball. They are not obnoxious....but it is a pool in Disney World, not a Sandals resort just for adults, it would unreasonable to expect it to be tranquil with no children playing.
This is an interesting thread! I will sometimes carry the smaller version of the Vera Bradley backpack but it is very small and I pay attention. I am firmly in the camp that you should watch where you are going...be it wearing a backpack, stopping mid-sidewalk, stopping at the base of an escalator, bathroom, or elevator, or generally not allowing your giant party to walk side-by-side and monopolize a walkway. There are six of us and we never walk completely abreast of each other. That was a good point about the fact that the parks are much busier and full of backpacks, scooters, and strollers than they used to be. People are also a lot larger than they used to be. I cringed when I read about the petite girl having her head smashed into a wall by a backpack. As a small woman with slight children, I'm always wary of large people with or without big backpacks backing up on us. People are so oblivious. The description of the tall man at the show bobbing his head made me laugh...that is so true!
And yes, the best way would absolutely be to politely and positively speak up and address the behavior rather than perpetuating the rudeness or worse, pushing back. Unfortunately if I ever dare to speak up about anything my children are mortified, so we try to let things roll off our backs.