A union is indeed a good form of being forearmed, and more should take advantage of it. That said, it does not prevent all exploitation. IIRC, the FA's in this

A union is indeed a good form of being forearmed, and more should take advantage of it. That said, it does not prevent all exploitation. IIRC, the FA's in this story have a union and a contract, yet this form of exploitative behavior is not prevented.