I don't think it is disrespectful to search their emails though, Harvard is fundamentally an institution funded by donors. This scandal majorly damage the reputation of the institution and was embarrassing to high profile donors and alumni. Protecting that is obviously worth more to Harvard then whether or not professors feel they have academic freedom. The only problem with all of this now is that the public also knows the emails were searched. Seems Harvard can't keep any secrets anymore.
I don't think it is disrespectful to search their emails
though, Harvard is fundamentally an institution funded
by donors.
In my mind searching someone's e-mail is like searching their pockets as they leave the office, or asking them to take a supervised drugs test: It's technically legal and some employers do it.
On the other hand, the people who work for me are trusted, respected professionals. I'd understand them taking umbrage if I asked them to turn out their pockets, or to piss into a cup, or if I started reading their e-mail.