I've seen cav doing it to another cav unit. My first time at NTC wasn't a duty station, it was a rotation. The 3rd ACR's CSM briefed us and gave a breakdown of what the 3rd ACR's mission was to III Corp and what was to be expected of us. While telling us that 3rd ACR was III eyes and ears, some douche yelled "Fuck Off" from outside. The culprit? It was 1st CAV's CSM. After he excused himself, which of course the inevitable argument that was a very loud ready to fight then and there for the cav honor or some other dumb shit, haha.
Cavtastic 1st fucking cav, the guys who ignored 1AD's advice with Iraq and caused us all to get extended...the same cavtasic idiots who brought a private purchased external thumb drive and infected the system at Irwin with viruses during a rotation and caused all of the DoD to block off USB port use...is one fine example of how institutionalized inbreeding from commander to incoming commanders, happen.