One had bumped a 2015 thread with the single word "bump".
Could have been worse, like a repeated comment--this is something many indulge in as to hide the fact they are trying to bump a post.
Back to your post, this is an innovative way to help correct a lot of people from things they are doing wrong even if it doesn't entirely break any rule/ Posting your observations as you try to find value-filled posts or comments.