A vote in favour (of a strike) would be disastrous for people like you if BA decide to finally play hardball and give 90day notice of new contracts on a take it or leave it basis.
They would not be allowed to differentiate between the good, loyal group of staff and the loony militants. That is something you should be more concerned about.
Surely if BA do eventually go the SOSR route, the contract on offer would be the one Bettygirl and other non union staff signed earlier this year. So why should she have anything to worry about?