There is no doubt, at least from my experiences, that one of the very early countermeasures, or not even a countermeasure, but just sort of a test, is for an otherwise, not that friendly pit person to suddenly become very chatting, seeeing if they can distract a counter or what not. I am not exactly sure what this is supposed to prove or not prove, but for whatever reason, it is something that occurs at some locations. For the player it is sort of a tip that your play has raised some interest even before more serious countermeasures and actions occur.
I had one several years ago that was just the opposite. I played a place (a place known by a single letter

) regularly (too regularly) and usually at the same time of day, because I liked their buffet for lunch. One of the regular pit guys was very friendly towards me, because he was from Philadelphia, which we discussed on one occasion when I was wearing some Eagles gear. So he was always very friendly, chated up Philly sports and other things. So one day, I sit down and his demeanor has flipped 180 degrees. Just sending out unfriendly vibes. I was backed off a short time later which lead to a strange incident of a counter catcher that they employed trying to become very friendly and chatty with me as if I didn't know who and what he was. I won't go into that story again right now.
My point is, it is about reading people, especially pit "people".