~~Someone could potentially decide to post something like that in a memes community to cause trouble, which would be worrying for a self-hoster like me. My instance isn't subscribed to anything remotely sketchy, so it sounds like I'm unaffected here, but it could happen.~~
Ignore the previous, that's literally what they did. I went in and manually purged it from the command line by removing every image from the last 24 hours. For other lemmy admins wanting to do the same (assuming a standard docker setup): sudo find /srv/lemmy/example.com/volumes/pictrs/files -type f -ctime -1 -exec shred {} \;
https://youtu.be/1Jwo5qc78QU?si=72Z4ZIM2N5BZydGM
No, copyright systems really are just that stupid if they want to avoid liability.