I've heard about similar issues in a somewhat older context; it took some training work to get 18-21-year-old Israeli draft soldiers to stop creating Facebook g

I've heard about similar issues in a somewhat older context; it took some training work to get 18-21-year-old Israeli draft soldiers to stop creating Facebook groups that reflected their unit structure, or at least to obfuscate the names. And there's been a lot of interesting work done by e.g. bellingcat.com to identify the exact Russian Army units and soldiers operating in Ukraine based on social media pictures taken out of theater. OSINT is a very big field in military intelligence; with the amount of information everyone pumps out about themselves, some leakage of militarily sensitive information is bound to happen. As an organization defending against this type of espionage, you just have to try to minimize the leakage.