A couple of days ago, I wrote a post entitled "Classmates.com". Today there's a comment from classmates.com, thanking me for sharing the story.
Whoever posted it must have read the post, because they mentioned specific parts of the story from the post.
You don't think classmates.com crawls the web looking for such posts, just to give thumbs up replies in the comments sections, do you? That'd be way too wierd.
More likley some prankster local is just having a little fun with us hack posters. That's my bet.