They’ve actually been caught doing this, in some instances.

There was a guy picking up radio signals and chatter from a classified test aircraft or something like thag.

He thought it was weird, reported it to local authorities.

Long story short, the military / government gas lit the fuck out him, told him it might be aliens, keep researching it.

He eventually went pretty much completely insane.

https://en.wikipedia.org/wiki/Paul_Bennewitz

Do try and keep your wits about you when delving into such stories and theories.

Some are total nonsense spread by grifters, some are innacurate but genuine reports, some are intentional mis and disinfo… and some of it is real.

It’s a fucking mess.