Rigga,
I see your point, but only to a certain extent.
On the way home from some hell-hole, you'll only pass through a civvie airport as a one off. It's not as if it's a regular thing. Catching the train every weekend to go home whilst wearing the uniform should definately be avoided, what with creating patterns and predictability and all that.
I know everyone is concerned about security but common sense has to come forward at some point.