Whilst I see where you're coming from, I don't agree that all of BASSA's followers were necessarily foolish or stupid or deserving of the sack - misguided perhaps.
I am still of the opinion that whatever British Airways can or cannot lawfully do, the Leadership Team will still attempt to win hearts and minds voluntarily. The small number of hardcore militants will either end up doing something stupid and getting sacked or will be so disgusted at having to work a wee bit harder that they'll end up leaving. In either event, in the middle of a whacking great economic crisis, that is stupid!