I have just realised that alien.top seems to be mirroring reddit accounts, posts and comments, without labelling them as such. What is the point of this one way mirroring? As soon as users realise, they are going to just leave. There is no point having a discussion with a bot that cannot respond.
Also not a lawyer, but right to be forgotten applies to search engines to remove articles from the search index. Originally applied to news articles some guy in Spain didn’t want showing up when you google’d his name. The law doesn’t require the publisher to remove the content from their website, but instead requires search engines to remove the links in results.
So if someone’s comment was mirrored to Lemmy AND that comment was indexed by a search engine linking back to a Lemmy instance, then you still have the right to request Google or Bing or whatever to remove those links from search results via the same process.
The legal right to correct or remove PII is also part of the GDPR and its implementations by the states that implemented it. This isn’t a blanket “I can take down everything with my name on it” law, but it’s also not something that just applies to search engines.
I can see why Facebook didn’t enter the EU with their Fediverse thing, operating a Fediverse server as a company under the GDPR seems like a legal minefield.