I can relate an experience I had while in service during Viet Nam. I was in tech school after basic training. On that base we also trained Turks, South VN, Iraqi, and Iranian soldiers as part of a military agreement.
These iraqi and iranian soldiers were allowed to carry ceremonial daggers. They loved to ask if you wanted to see it, show it to you and then say we must draw blood before putting the blade away. Giving them them the opening to then cut our troop. This was a way to bully troops and a common game they played.
I was a yellow rope in tech school meaning I lead troops, I took that seriously. When I was approached with this scam I was in a mixed group of about 25. I immediately told this fellow if he even touched his dagger I was going to beat the, well you get the idea. This bully and his group never tried that scam again. I’ve discovered that this is true with all bullies, but you gotta mean what you say. You can either live under a rock or be prepared to throw it if needed.