I think DALPA has handled it correctly so far. Management has staked out their position and we have made ours clear as well. Nobody has taken any action yet.
It would be wrong and probably illegal for the union to come out and advocate "no acknowledgments until three hours prior" before management has taken any actions of their own.
As soon as Dickson docs someone's paycheck then the door will have been opened.
Until then, I think it is the smart move to remain calm.

Let flight ops be the first ones to resort to "self-help". After that, Donatelli will be free to react.