I have on rare occasion asked parents of kids to be more mindful, I received the sort of vitriol one should expect from parents who have thus far failed to instil manners into their kids. Not once has any good come from it - so I have given up. There is no education happening there and there is clearly nothing I can do about it. Parents especially seem oblivious to noise of own kids. For the cafe, instead of making judgment calls on a case by case basis which can cause insult to the parents it's simply easier to have a blanket ban. I could see it being a problem if the cafe was the only place in existence, but children can practice their manners elsewhere, there are plenty of other places for them to go. I don't see how having one additional place would improve their manners.