People seem to be supporting ej because they can not risk being sued by a parent in case something goes wrong. That is a red herring. The parent gave consent to a prefectly acceptable solution. I still can not see how ej can overrule a parent acting lawfully. If the child pukes that is a risk taken and accepted by the volunteer. If they took umbrage at that it would be with the parent and not ej.
Regarding suing. If it could be shown that the crew acted outside their jurisdiction and mis-interpreted the Ops manual so that this lady and chldren suffered considerable discomfort and financial loss, it is perhaps she who has a case to pursue against ej?