Absolutely astonishing seeing people try the “I’m going to be as annoying as humanly possible” to the guy with the gun with the “my YouTube lawyer says I can” defense. You don’t want to have to defend your civil rights in court.
This goes doubly when at immigration where you basically don’t have rights.
This guidance also applies to: bank tellers, call takers, baristas, waiters, other people standing in line with you, the bus driver, your mom, the neighbors upstairs, the raccoon across the street, …