I am trying to be sympathetic, and I can see how frustrating it must be to leave your baby and spending all that time expressing and then have your milk be wasted, but really, she was being impractical to think they would let her take the milk on the plane. You are allowed to take milk in excess of the standard 100ml to feed your child who is with you on that plane journey, not to carry several litres of liquid onto a plane because you want to take it home with you. surely anyone with any sense would had thought that through?
I also suspect she deleted any comment that did not say "right on sister! Those nestle sponsored formula fascists! Trying to kill your baby and take away your riiiiiiiiiiiiights!!!!"