> the people most vocal against Article 13 are those who want to leech other people's creations for free.
Why would such people be at all concerned about Article 13? Torrent sites and swarms have been in flagrant disregard of the law since forever, one more law isn't going to change much. Likewise the other popular pirate mechanism, the old "upload an archive with the content to Mega or similar" technique, already frequently uses encrypted archives to make sure only people coming through the right channel (often an ad laden website + several even more ad laden URL shorteners) get access to the content, making a filter requirement ineffectual there as well.