I think the GB took a lesson from the Olin Moyle case and know better than to go on public and acuse someone of some wrongdoing, real or not. They know such behavior can turn against themselves and be taken to court and won by the DF person. That's why they don't state the reasons publicly. I actually agree that it shouldn't be publicized, so to avoid adding unecessary stigma to an already unpleasant situation.
Of course, the rumour mill is the drawback of this situation. I wasn't DF'd but after my JC I stopped attending meetings. Those close to me know that the reason for the JC was an allegation of apostasy. However, gossip going around has it that I've been attending meetings of another religious group! How insane is that?
Eden