When made as general, sweeping statements, I have no problem with the comments about social media plants. I don't know whether it's true (as I said in another thread, I suspect Disney monitors the forums for general trends via third parties, and specific employees and individuals in leadership positions frequent the boards informally out of curiosity) that there are plants, but I wouldn't be surprised at all if it is. Plants seem pointless to me, but plenty that Disney does I deem pointless, so it wouldn't be a substantial deviation from the norm in that regard...
However, singling out an individual poster and calling them out as a plant, with nothing more to go on than the odd opinions they've presented seems to cross a line. It's like WDWMagic's own form of McCarthyism. To me, it says more about the people making the allegations than it does about the one being accused.