On the technical side,it isn't so much the desire for a hanging as it's an accusation of a crime. Treason, a big one, while it hasn't been proven in court, which would allow for a slander or defamation suit. Twitter might be seen as facilitator and co-named..as the regulation is being interpreted currently.

Should the subject sue, you would be pressed to provide proofs and we know how that would go, especially with classified information.

So Twitter can say they avoided a potential slander suit by suspension.