I suspect that if employees at Meta who are tasked with hoovering up training data from everywhere they can find are just watching porn, it probably won't go over well on their annual reviews.

I would give good odds that the human at Meta most-closely responsible for the BitTorrent download at issue probably has never even seen this particular torrent by name or URL. The scope of data involved in training is too large for direct human involvement. They probably did something along the lines of writing a bot in Python or similar to spider websites and feed every torrent it could find into a torrent downloader. That downloader's output then gets dumped into some massive internal collection of data that gets used by some other team as part of the training process. The humans just create tools and set them in motion, never actually see the overwhelming majority of the data that they're processing.