The cut direct is for social situations - at work, the modification is that you ONLY interact with them as required by business. You are icily correct and professional.
No idle chit chat and not one extra moment after the required work has been done. You have something else that needs doing right then, you take your leave as soon as they indicate that there is nothing else required at that moment.
Knew someone who got fired - ran into them in the cafeteria a few months later (open to the public as there were no other places serving food for a couple of miles - mostly a residential area around the few business campuses). I left the cafeteria's vending machine area quickly and went to the security desk (inside the secured area) to point out that he was in the building, that he had been fired for cause & escorted from the other building across the street several months ago, and he appeared to be in the company of a current employee who might "card" him into the secured areas (privacy act information and proprietary computer programs - not a military installation) - if the young woman wasn't aware that he had been previously employeed & fired...
I wouldn't have trusted him to tell me...well, anything. Not even that he was a dirty minded pervert with a filthy mouth and had no respect for women....I could see that for myself!