You can literally spend less than a minute on Stravas new data service and find sensitive sites. Nice patriot position you have there 
hmmm i wonder whats at this random heavy route in what looks like a mountainous and remote area of libya. Oh look some bunkers that were targeted in 2011 
what do you guys think, they decided to go for a stroll up that hill or we have a tunnel system too. right next to the bombed out bunkers in PT 
Patrol on the Korean DMZ. You can pretty much perfectly make out the route they take on snowy sat images 
Annnnd it gets worse. You can view individual routes if the person selects that option. In a couple minutes ive been able to find the profiles of Lt Cols, C130 pilots, Italian soliders at mosul dam, past Ukrainian diplomats in syria, 
Oh boy it gets even worse. You can spoof the service and collect all the past data of people who ran there. Separate of the route feature
And since people link their FB accounts you can simply just click their icon photo and it reveals their Facebook user ID
