I am Kleebner on the SA boards and I cross-post often. In fact I think that the thread was made more to make fun of me for cross-posting so much than to actually accuse me of plagiarism. Heck, the one time I did copy a thread, I said that I did so in the OP.
The last link that was posted by Trigonal Planar was not so much the copying of a thread, but just some links. I don’t think that spreading links to neat stuff qualifies as plagiarism.
Ever since I was last accused of plagiarism, which I still insist that I was misunderstood and the accusation was wrong, I have been very sensitive to any possibility of such suspicions. I hate to post stupid forum drama threads like this, but since the last thread was closed, I have no choice.