The analogy I remember is the one in which the enemy may know, for instance, that two ships are leaving on a mission. Some person may think they are being clever and say, 'two baby birds leaving the nest'.
The moral of the story is that a piece of information whose value may not seem apparent to a poster may be the missing piece of a puzzle to our enemies.
God bless you, and our Free Republic.
To our enemies, we are coming. Fit that into your puzzle.