If you don't want people revealing the stuff they find, maybe don't include assets you're not using yet in your compiled game. At least not what you want to keep a secret.
Are they serious, they're going to blame people for discovering sound clips that were left there unused for 2 years? Do they just enjoy wasting people's disk space or something?
The most baffling part of it is how it looks like zero attempt was made to attribute credibility to sources.
Using Reddit as a source was bad enough (of course, they paid for it, so now they must feel like they need to use this crap). But one of the examples in the article is just parroting stuff from The Onion.
Edit : I've since learned that the Onion article was probably seen as "trustworthy" by the AI because it was linked on a fracking company's website (as an obvious joke, in a blog article).
If all it takes for a source to be validated is one link with no regard for context, I think the point stands.