The missus was advised that the best way of equalising the pressure in the baby's ears is for it to suck on something. Therefore during take off and descent she would always give the baby a drop of the draught. As you all know, a baby in distress or slight pain tends to be somewhat vocal, thus causing distress to other pax.
For descent, she always knew when the seat belt sign came on that it was time to start feeding. It was more difficult to get clues for take off. Perhaps an announcement could be made from the pointy end along the lines of "Ladies and gentlemen, we shall commence the take off roll in two minutes. Would all brest feeding mothers please prepare yourselves."
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