I used to exchange comments with this man many years ago and the most irritating aspect of his comments was that he used to copy and paste information and trying to make it appear like he wrote it himself! But it was not hard to figure out it was not his own writing judging by the style of the writing. What I used to do was I would copy a paragraph from what he was posting and search for it on the internet and I used to find them all the time. I used to tell him that he should always give credit to the person who wrote it and also provide a link.