Little of the information that instance share is not personal.
The only PII contained in that post you wrote is your user name. My instance has no idea what IP address or whatnot you used, it gets sent "user posted message", "user voted", etc. messages by lemmy.world. It does not interact with you.
The information that your instance shares with the rest of the world is a) pseudonymous, unless you dox yourself no connection can be made between your handle and your actual person and b) said information transfer is part of the primary service of the platform. You wouldn't be here if things wouldn't get shared that way, hence, you consented.
If it wasn’t, tracking cookies would not be a big deal unless you had the real name of someone connected to the cookie ID.
Cookies are no issue. Tracking without consent is. Lemmy isn't tracking you. You have an account with lemmy.world. You presumably have taken notice of its privacy policy. lemmy.world is run by a Dutch foundation, and yes they have a legal department... or at least lawyers. If you're a EU citizen the GDPR applies, otherwise other stuff might apply, they're spelling it all out.
EG Your ISP could be subpoenaed to reveal the customer behind a dynamic IP-address, making it a personal datum.
...yes? You gave lemmy.world the right to log your IP when you signed up. They're not retaining it longer than necessary because of the general GDPR provision of data frugality, but if a court order knocks on their door saying that they need your IP they can also be required to wait until you log in and then send that fresh IP directly to the authorities. Newsflash: The GDPR does not provide opsec against EU state actors. Off to the darknet with you if you care about that. It does provide opsec against ad networks, data brokers, etc... well at least in so far as it's actually enforced.
Don’t expect me to defend the GDPR. It’s neoliberal/conservative bullshit; even an abandonment of enlightenment values.
The fuck are you on about.
Yes and it's identifiable. That's why I mentioned your online handle. You also not just consented, you tasked lemmy.world with broadcasting it all over the place. Complaining about that is like complaining about an email provider sending an email to a recipient.
That has nothing to do with the data transfer lemmy instances are doing among each other. Which was what you complained about. Yes, it's personal data, yes, you consented. No, the GDPR has no issues with that. I could've been more clear in the beginning, let me ask again:
Which personal data do lemmy instances exchange that you did not consent them to share. That is not necessary for them to share to function as federated social network. That, in fact, isn't available via the web interface. Exactly one thing comes to mind: Votes are identifiable and not everyone knows about that but there's also a discussion going on.
You know what? Why am I even talking to you. If you have something to complain about, contact your data protection officer.
Nope it already started at the neoliberal/conservative bits. Neoliberals would like to own all your data freely, privately, while conservatives would like the police to own all your data. Things like Chat Control come out of the neolib/conservative corner of the EU while data protection is a Pirate/Greens/EFA thing, with Socdems and Demsocs not minding it but not taking the initiative, either. Oh and there's also some conservatives who are in favour because digital sovereignty and such.