Hypothetically speaking: going to scihub, pirating an Elsevier paper, and then uploading proof that you had done so to an Elsevier cloud account doesn't strike me as the brightest of moves.

Not in the sense that I think you are guaranteed to see consequences, or in the sense that I've actually heard about it actually going sideways, but to my intuition it does seem like the kind of thing that might attract one of those "pay us $10k or we sue you for $10M" letters down the line.