There is a way to be totally safe from lawsuits. You download and upload as many files as you like, you just ensure that none of them is copyrighted. If you want copyrighted material, you buy it from the relevant outlets. I don't understand why you say "Regardless of legality" as I'm sure legality comes into it somewhere along the line.
I'm not sure that possible, reasonably plausible, and reasonably possible are terms that the legal mind would think about in preparing their case. Totality, on the other hand ........
It was an entertainingly ambiguous question and if you were running a book on the possibilities, I would have to be equally vague in predicting odds.
