There was some weirdo on reddit who only replied to comments that were years old. I'm not sure how he did it, as I thought posts became locked after 30 days or whatever (maybe this varies by sub?).
The dude replied to some trivial comment I made 9 years earlier. So I looked at his comments history and they were all like that. I'm not sure what his game was. His replies were borderline "ackshually" in nature but mostly just replying to reply.
Some redditors are just inane.