If I had received a text like that, nothing (short of physical restraint/being knocked out) would have kept me on that plane - I've have been standing in the aisle screaming to be let off - at which point the cabin crew would have had no option but to take me seriously.
For me, that's the bit that doesn't add up. However, I think the cabin crew could and should have listened and taken her seriously - just because you may get "battle-hardened" doesn't mean you shouldn't take this kind of thing seriously. There's no guarantee that the outcome could have been prevented, but this way, the poor woman will never know.