It's a fun conspiracy theory, but Facebook leaks like a sieve, so if it were true I'd expect it to be in the news by now. I would also hope that Facebook's infrastructure isn't so fragile that a small mutiny of a dozen employees could hold it hostage. But you never know.

If you want a better conspiracy, how about "the whistleblower is a Facebook plant inserted to control the narrative and influence the regulatory capture Facebook needs to further entrench its position as a permanent fixture in society."