It wasn't a thread with autumn poems, it was a thread with alterations (photoshopped pictures), one if which happened to have an autumn poem in it.
But I'm glad to know someone actually cares about them.
Actually, the old thread is still there: https://www.gurochan.cx/g/res/47.html
There's also a new one here:https://www.gurochan.cx/g/res/67047.html
Thank you very much!! I've thought about this image for a long time.