Perhaps a general statement from an airline indicating that passengers travelling in Business Class expect sufficient standard of comfort and quiet within which to work or to rest might suffice? Particularly with an addendum noting that parents flying with their children are asked to ensure that the behaviour of their children is commensurate with the spirit of this expectation?
It's not the teething small squealer which is the biggest pain (try a miniature Drambuie- oops, I never said that!), it's uncontrolled little beggars making a nuisance of themselves whilst their parents do nothing to stop them who are the biggest irritant!