Protonvpn claim they have a few VPN. Honestly one of the easiest ways to torrent imo is to get a real Debrid subscription let them torrent them download the file through them without a VPN.
The most I see is that they could see your IP address. Not good if you are being stalked. Again I don't think this is a very big deal. If you are worried turn on a VPN.
What could a hacker even do with your Lemmy info? Unless you are posting critical information about yourself I don't see this as a huge issue. More of a concern for the mod and admin teams imo
If you already have a Netflix account then Oxenfree