Start a new Harley appreciation thread, simple as that! The reason the old one was locked was due to performance issues, which led to the new policy of trying to limit thread lengths. Include the year of thread as well, and the word "appreciation", like "Bringing Harley Quinn's Mallet of Appreciation since 2019!"

And you can find people who like Harley as a character here as well. I guess they just need some positive reinforcement.