BDiONU is absolutely within his rights to voice his opinions, and civil argued responses are what should be used to rebuff them if you don't agree with them.
To my mind, if NATS took some excess out of the pension fund, which in effect is what they did when they took their holiday, then they can damn well apply it the other way and put their hands in their pockets and make up any shortfall if it comes to pass.
You can't have it both ways.