Not sure I'd call it a "wildcat job action" so much as a grass routes campaign for the pilots to fight back a little. And I can't see them being able to fire anyone (union at least) that's off probation and returns with a doctors note.
I could be wrong but that's how it appears to me.
Either way, I was hoping to find a thread on here already about the site. Can anyone post a link? I've had no luck finding anything.