It is all down to the adults. I don't have kids myself but if I did and they started screaming, running around or otherwise misbehaving I would leave with them straight away. It isn't fair to others to have kids who don't behave causing mayhem.
Many parents however seem to feel that they can let their kids do whatever they want and few hotel staff will intervene and tell them to leave because they are causing a disturbance. Good kids tend to result from good parents and the lousy parents cause the problems not the kids per se.
I think there should be a global warning that disturbances from kids or adults will not be tolerated and if other guests are being disturbed those causing the disturbance will be asked to leave.
My biggest disturbance recently was a massively noisy group of adults at the IC PL.