Seems the person that spread that was mistaken.

They deleted content that was in public subreddits, then when the privated subreddits started going public again, the posts he made in those became visible again, making it seem certain content he deleted was being undeleted.

So far, there's been no verifiable report of actual undeletion of content.

But besides all that, with GDPR and the similar California laws, Reddit is already asking to get sued and get the EU on their ass, for not deleting peoples data on request, as compliance requires.

Most of that was from subs coming back online. You can only delete visible content. I've been going back every few days and deleting the stuff that came back online.

I've just been sorting my comments by highest score and replacing a dozen or so each day with something like "-> fediverse". So far none have been restored. Most of the lower scored comments don't have value to anyone anyway so I'm just ordering by most impact until I get bored.

Not participating isn't the only choice.

On days I'm feeling particularly petty I go into discussions and vote down the good comments and vote up the bad ones just to make the signal to noise ratio worse. Yes, I'm that petty.

Engagement is what drives social media. Upvotes, likes, page views, searches are the fuel for their algorithms. (Or at least that's what it seems to me.)

For what it's worth, I used Power Suite Delete to replace everything in my 14 year account with a deleted message, haven't seen anything get reverted yet.

That will come automatically once my 3rd party app doesn't work any more. Hopefully some Lemmy apps will be available in the App Store soon. The website on mobile is quite suboptimal.