That is absolutly disgusting. Obviously the baby would have to be extremely distressed if vomiting. Talk about learned helplessness/hopelessness.
I'd say that if a child had to purposefully vomit to get attention then they must be absolutly DESPERATE for attention - and abviously not getting enough.
It feel like they want us to start treating our baby's like robots or animal - next they'll tell us to rub our childs nose in their poo if they don't toilet train quick enough!