A case of one of them...

     I'd mention some of the bigger social red flags in dealing with any person on the matter of perception, reality, social politics, government, and so forth.  

Here's a small of list to be considered:

1.  Not ignorant and given to much social persistence.  Probably the biggest red flag I could think of, it it weren't a matter of insistence, hardly giving up, a lack of desire in relinquishing control on a subject matter.  A common interweaving of personal social communication in such discourse reverts upon the craziness of a given subject matter, or that thoughts are dangerous, never mind, all the tantrums of a society through well sanctioned air waves, or socially acceptable tantrums, tirades, or any place where an acceptable forum were to the well accepted social verse of a civilization.  These sort of typified speech patterns use the sorts of language one might as well find in China, or that a dissident opinion reflects something of personal mental instability, although recent trends could be posited on something like 'grammar', but this is nothing of an old variation from the sort of social tirade, whether from the likes of an idiot driven security apparatus which might have used the bellicosity of language in reflecting its own desire for cultural revolution.        

2.  Too probing.  If you weren't drugged out enough apparently and were too keenly present in a given existential moment, you might notice how bad the actors were...they might ask for personal history, they might start up by saying, 'I am having these issues...'  the sort of thing that might lead one to roll one's eyes interminably given to the nature of acting...or why the FBI really insists that encryption is a problem to them, maybe it were that their ranks really are starting to stink at their jobs all the more.  If they had a hard time really sliding through personal information, and you weren't up to the task of social complicity, you might have questioned the inquisitor?

3.  Bad social network.  People that seem to know too much personal information about you when you haven't divulged an ounce of information to them.  A potential social danger?   

So if you hadn't learned to be ultra assertive by now, I'd suggest its a better pathway, outside of complicit interaction.  Setting up separability between yourself on the sick societal occult gone awry is the first step to personal liberation.