I ran into an interesting incident of this recently. I got a Google Scholar alert about a paper with some experiments related to a paper I had published a while ago, by one "N. Tvlg". I read the paper with interest but I started noticing that although the arguments sounded good, they didn't really make sense, and also the descriptions of the results didn't really match the figures. Eventually I came across a cluster of citations to completely unrelated papers---my field is computational linguistics and these were citations to, like, studies of battery technologies for electric cars. I looked up "N Tvlg" on Google Scholar and they had "published" several articles very recently in totally divergent fields, and upon inspection, all of them had citations back to this materials science research buried deeply somewhere. Clearly these were LLM generated papers trying to build up citation count and h-rank for someone's career.