I didn’t know reddit gave out the personal details of their users, but I guess I shouldn’t be surprised.
You make it sound like they have a choice, or do so freely and willingly.
The article is clear on that they don't freely share without assessment though:
Reddit wasn’t willing to go along with the request, at least not in full. The company objected, arguing that handing over the requested information would violate its users’ right to anonymous speech.
Recent legal activity shows that Reddit doesn’t intend to automatically comply with all user information requests.
Lemmy is not storing anything for no reason tho, there's no point in that without advertising. The only data they could hand over would be public anyway.
"the movie companies would like to see comprehensive details of the subscriber’s torrenting history, including records of visits to The Pirate Bay. In addition, it seeks information on other social media profiles, where more relevant information might be found."
The problem is, legally, nobody is required to maintain that information. They can ask all they want.
"I'm sorry, my browser history is deleted every time I close my browser. Problem?"
Unless you're using a VPN, the ISP knows, and I bet they keep the records. Even if you're using a VPN, they'll know what VPN server you connected so the feds go after them instead.
Depending on how many infringement claims they're making against OP, and I'm assuming it's a lot if they're asking for info on a specific user and not a whole sub, well, good luck OP