I went to college in the early 80s after six years in the Air Force, holding a TS clearance and daily TS intel briefings.
When any of my professors started to use false data I would engage them (never divulging classified). At least back then they would listen to me and mostly concede the argument after I gave them the real facts.
I wonder what would happen to me if I did that now?
You’d probably get yelled and screamed at, and your grades would be systematically reduced, even in classes where the professor didn’t give a fig.