That's right. Basically QF can allow the ban to go ahead, or espond by lockout - would seem OTT; or not accept the ban - ala the left-hand LAMEs - and not pay pilots that choose to make the union PA announcements.
Crusader,
The FWA legislation (as I understand it) ensures that action taken by the employer is proportional to the action taken by the employees. If QF were to respond to the making of PAs by pilots with lockouts and docking of pay, I imagine it would find itself in FWA in about a nanosecond. So while these actions would be consistent with QF's bullying style, the FWA should ensure that it does not happen.