I agree with you for vast majority of population. But my daughter is hell on earth, but cute as shit.
Ive tried spanking, shouting, discussing, rewarding, punishing, reasoning and she is just 10000mph 14 hours a day (shes 4). Soon as shes a bit older and more mature for a sport i should be good. To give you an idea my son is respectful at all times and if I look at him the wrong way he shits himself.
I wouldn't take my daughter to a museum BECAUSE she is like that. So the parents mistake was two-fold...not being in control of their kid and knowingly bringing her somewhere she wasn't mature enough to behave.