Those "anonymous sources" have good cause to be anonymous.  "Whistleblowers" are not appreciated by those in the role of "whistleblowees" and reprisals are almost guaranteed.  As you mention, Trump is far more concerned with the public exposure of misdeeds in his Administration than he is with the misdeeds themselves.  I fear your parallel reference to the U of O is all too accurate.  It's one thing to use the Public Records/Public Meetings laws to protect an "accused employee" during a disciplinary process.  It's quite another to use it hide information which, as the statute says, would fall under this exemption to non-disclosure: "unless the public interest requires disclosure in the particular instance:"  Bureaucracies are quick to release information which supports their position and reluctant to release information which weakens it........that's not exactly "breaking news."  regards, "Gary