Well, the list of exempts is the list of defense contractor employees, and the negative list of non-exempts subtracted from the list of everyone is list of high-value targets.

The locations where exempts are gathered, locations where there are high commerce traffic and/or verified sent-in data, but no sent-out data, or abnormally low traffic altogether, those are all high-value targets as well.

No matter how you slice it, they're creating a list of airstrike targets and means to aid literal foreign spies. If the affected locations and people are as obvious and well guarded as the US DoD headquarters and uniformed guys there, fine, otherwise, they're just creating doors in the wall exclusively open for "enemy" uses.

They probably have internal chat systems (cough matrix cough) that don't go above 50 M MAU which afaik is the threshold of applicability of this law. So this particular is a non-issue, unfortunately.

But then it begs the question, why politicians feel the need to use public (>50MMAU) chat systems to conduct the protected (official) business?