I used Power Delete Suite to remove all comments from all public and private subs. They all came back today. So I re-deleted them again.
I suspect it's more likely the site didn't process the deletions properly, rather than maliciously bringing them back, or as you suggest, that they were private.
Edit: It's possible that the deletion only worked on public posts, after all, it seems?
I suspect it's more likely the site didn't process the deletions properly, rather than maliciously bringing them back, or as you suggest, that they were private.
Edit: It's possible that the deletion only worked on public posts, after all, it seems?