From Terry Pratchett’s Discworld character Commander Samuel Vimes.
It always embarrassed Samuel Vimes when civilians tried to speak to him in what they thought was “policeman.” If it came to that, he hated thinking of them as civilians. What was a policeman, if not a civilian with a uniform and a badge? But they tended to use the term these days as a way of describing people who were not policemen. It was a dangerous habit: once policemen stopped being civilians the only other thing they could be was soldiers.
– Terry Pratchett, Snuff
Emphasis mine. I don’t have much to add, it’s a pretty plain and straightforward warning.
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