"Let’s say you’re locked in a heated geopolitical spat with a few of your online friends in a small chatroom, and you happen to be privy to some classified documents that could back up your argument. While it’s tempting to snap a photo and share it to prove your point, especially given the appeal of impressing onlookers and instantly placating naysayers, it would behoove you to take a step back and think through the potential repercussions. Even though you may only plan for the documents to be shared among your small group of 20 or so friends, you should assume that copies may trickle out, and in a few weeks, those very same documents could appear on the front pages of international news sites. Thinking of this as an inevitability instead of a remote prospect may help protect you in the face of an ensuing federal investigation." https://theintercept.com/2023/04/12/classified-documents-leak/
What to Do Before Sharing Classified Documents With Your Friends Online

While it’s tempting to share a photo to prove your point, you ought to think through the potential repercussions.

The Intercept
@micahflee Parents have been doling out this kind of message to their kids for several decades as it relates to posting things online. You’d think “classified documents” would be a given as items to not post.