Its a big problem
If a company can retroactively classify something that is clearly not a "trade secret" in this way, then the way is open to simply randomly sack people for "divulging trade secrets" for the heinous crime of visiting DEFCON.
If a company can retroactively classify something that is clearly not a "trade secret" in this way, then the way is open to simply randomly sack people for "divulging trade secrets" for the heinous crime of visiting DEFCON.