Shouting, stomping your feet and screeching at people are an effective way of getting what you want. If you are a two year old.
My Mum used to tell me that if we were in a supermarket and I saw something I wanted, and she wouldn’t let me have it, I would say I felt sick and then vomit. It didn’t work. Mum was smart enough to realise that taking the easy way and giving in would make life harder later on (for both her and me).
Without making any comment about Lindsay’s parenting, it is a pity there are some things she didn’t learn as a two year old.
But then again, why would she, when the same behaviour keeps working?