I don't think anyone disputes Ryanair's management style is not the greatest, but I am yet to see hard facts of regulations being broken.
If they operate to the minimum regs then they are safe and I fear the pilot group have shot themselves in the foot because how can you claim the operation is not safe but turn up to work the following day and continue to operate the same way as what is being claimed to be unsafe.
It doesn't reflect well on the crew in my opinion.
This to me appears to be a case of a fight against T&C's and has been hijacked with the mantra of safety to leverage the management in to changing because so far the uniting route has failed.
Not sure what the solution is but, I think they are going about it wrong by using safety as a complaint.