This reminds me of the late 1980's when we were advised to check our vehicles for IEDs (we called them "car bombs" then...) every morning before we got into our vehicle...
US Troops Warned Not To Wear Uniform In Europe
I think that one of the main threats to our security in these technically advanced times is the use of "social media" by just about everyone. I am not against "Facebook" but I do not have an account and I believe that people should think carefully before putting too much info into the "public domain".