If you post something in a publicly accessible area, you would be a fool to think that the public will not access it.
I'm an AZ All-Hazards COML that creates documents such as this, and when my agency produces a document that we don't want the public to access, we simply DON'T host it in a PUBLIC location.
"For Official Use Only" has ZERO OFFICIAL meaning.
Do you know how many times "bad guys" have been found to have eluded law enforcement/pulled off the "crime of the century"/shot down a police helicopter/destroyed a trunking radio system/stole Aunt Bee's secret Apple Pie recipe(This one MAY have been due to inside information), because they accessed information such as this in the past 25 YEARS? Here's a hint - you only need part of one hand to count them.
"Posting PD helicopter flight history" - FFS they do NOT fly double-secret flight paths that, once discovered, will allow the terrorists to blow them out of the sky! The flight path of a police helicopter is the textbook definition of EXTREME RANDOMNESS.