Sure, sounds plausible. However, any terrestrial humans that have or acquired access, are/would be failing not getting the word out. At this point, thisanon considers if far more likely that rotten governments and treasonous people would happily try and smoke-bomb out via fake alien fears blue beamed UP from the ground, onto the clouds above. It’s simple really.
To the conversation and comments earlier about ‘the highest’ classification:
Honestly, try and figure out what is more/most dangerous to any society or group of people… an outside enemy or threat, including malevolent extraterrestrial or subterraneans…
Or sedition and treason from within?