Originally Posted by
exbayern
Passenger is speaking in calm, moderated tones.
Manager says 'can you calm down here'.
This is common tactic in my experience; I become even more calm, quiet, and exacting in my speech when stressed, yet I am often told to 'calm down' when I try and point out something (such as when I explain that I am medically unable to use the MMW, but am told that I am 'opting out')
Using that phrase makes it sound as if the passenger is behaving inappropriately, which isn't the case.
Clerks do this in order to trump up a charge of disrupting the screening process.