My suspicion is that when searching for duplicates prior to posting, the poster encountered that question. Given that their question is clearly a duplicate many times over, I would suggest that their choice of search criteria was something like "How to handle xxx", which would have thrown up the leg shaking question, rather than anything about noisy co-workers.
They would have then seen that it was an upvoted question, the basic format probably appeared easy enough to adapt, so the poster simply copied and modified the text from that question to suit their needs.
Would it be classified as plagiarism? Perhaps, but I don't think that was the intent in any way. The question is clearly a duplicate anyway.