I've noticed that on trading floors. Why do traders keep bats at their desks? Are they actually intimating threats of violence to support staff who are stuck on the floor dealing with them?
Yes. It's a passive-aggressive tactic of a veiled threat.
However, the logical among you will realize, over time, that those people are insecure weaklings and that they are bluffing. They are basically child bullies dressed in suits and wearing ties.
Once confronted, they will attempt to outwit their opponent until faced with undeniable facts. When this happens, they break down. It also seems to be a rite of passage for anyone dealing with them, otherwise they show no respect.