Thats not how piracy in germany works. Torrenting for german content is quite uncommon. Normally the pages either point to sites hosting a streamabale version of the video content or point to a external file hoster (e.g. Rapidgator).
Obviously, because, as the chain of comments above your shows, torrent users are easily caught and get fined to hundreds of euros per downloaded movie. Then they stop using torrent and tell all their friends about the experience. This has been going on for more than a decade, maybe two. So by now, German culture has adapted and people don't use torrents.
Downloading copyrighted is not illegal, offering is.
You could try to argue technicalities in court, but that'll probably exceed the hundreds of Euro the copyright owner demands.
Years ago I did exactly this by modifying my client to never seed/share, and also to fake my reported sharing stats so the private trackers wouldn’t boot me for failing to share.
Those were the days.
Now, I no longer fear the ISP or copyright holder chasing me (seems ISPS and laws moved on where I am) and don’t bother with modifications any more.
This would very quickly be identified by private trackers these days because the stats don't line up with your peers and earn you a permaban.
Then you may get a court order that states what the lawyer accuses you of and this you have to react to. The court just states this and gives you 2 checkboxes. If you check the one saying “I reject the accusation completely” the lawyer needs to decide. He invested some 40 euros into the court order but going to court is a different ballgame and not his main business model so they have to weigh the chances.
The owner of the router that the file went through is responsible for access to the router. Since the owner has so far not said anything to his Defence there is a possibility that multiple people including family members had access to the router and the lawyer might, in court, be presented with a list of people and their addresses which satisfies the defendants task to erschütter the accusation for the court and leave the lawyer with the option to figure out whodunnit or rather who in the list is going to fold and pay.
This is really not his business model. That said they do go to court and people get sentenced to pay the fine.
I even know of more people using Usenet then torrents! The amount of work to use torrents safely just isn't worth it for most people.
I'm not aware of this having happened for movie downloading but it has happened to data breach forums, the police in Holland have contacted some downloaders there after they took down a platform (raidforums): https://tweakers.net/nieuws/208638/politie-mailt-duizenden-n... (in Dutch, sorry)
So it's not unprecedented and certainly within the legal realm of possibility even though this is a different country.
Using a VPN isn't a lot of work really? And that's more than sufficient. It does cost a bit of money but so does a good Usenet server.
The problem with Usenet is the DMCA takedowns so you have to be really quick these days, after a day the content is gone.