I can see that point of view,, but if she was shamming, why walk?. Sometimes people laugh when they are scared though. its a defense mechanism. I just dont see Natalie as someone to hate thats all, more like someone who needs to get some inner stength from somewhere. as I have said, she did the right thing by walking, and it is probably better for her shes out of the show.
I did feel sorry for Sophie when the rest of the 'gang' derided her efforts, especially Sheila, thought that was most unfair, especially as Sophie got them some 4 meals out of five!.