It has happened for DCS in the past.

The real reason this is always happening for Warthunder is because it's being sensationalized by the media and what's happening is being massively misrepresented.

Every time one of these articles comes out for like the last 6 months at least the "leaked classified documents" have already been available online for _years_. But someone posts these easily findable documents on the Warthunder forums and suddenly the leak originates from the Warthunder forums because it makes a good article title.

One of the more recent "leaks" was just someone posting this easily purchasable flight manual: https://www.flight-manuals-online.com/product/eurofighter-ty...