BA publicly go about antagonising their staff. Facebook, Bassa and now crewforum witch hunts.
It can't be a surprise that BA management are taking this route after staff have engaged in numerous examples of libellous behaviour on those places lately. The discussion now of what is supposed to be highly confidential information is clearly the final straw.
It hardly reflects well on the company, nor does it do any good for the morale of other staff who may have volunteered and are now feeling threatened with their names being bandied about, if such behaviour goes unpunished.
It may seem harsh, but BA management are clearly in no mood for this. If someone comes into possession of such information, and discusses what to do with it, it can be no surprise at all that the company will come down hard on them.