While the name may have been subject to a media blackout in the past, yesterday a U.S. Senator read the name aloud on the floor of the U.S. Senate during public testimony. That name is now part of the public record, that will be continually stored in the Library of Congress for any U.S. Citizen to read:
https://www.congress.gov/116/crec/2020/02/04/CREC-2020-02-04-senate.pdf (S824 to S825)
According to the previous question on this topic, the whistleblower's name has been protected because it wasn't publicly available, but that is no longer the case. As a new public record, what used to be a semi-secret has now entered the sphere of public discussion and this farcical idea of secrecy can no longer be continued. He alleged that the whistleblower and "Misko may have worked together to plot impeaching the President before there were formal House impeachment proceedings."
Any legal or moral consequences of bringing this name into the public arena fall on the Senator who did so, but I don't see how Stack Exchange can limit public discussion of public testimony given in the United States Senate.
While users of the Politics SE, can argue whether or not this outing was just or moral thing to do, the fact remains that the name has been outed and to continue censoring public record, because certain members are offended by it is antithetical to the principles of free speech.