I’ve posted this before to others. People open and close website accounts very frequently nowadays. It’s easy to do and enhances personal security. You cannot tell from account creation dates and posting history who is or isn’t a “newbie.” The “newbie” may have been posting on this blog in various guises for twenty years, for all you know. Just sayin’...
Given the trollish nature of his posting history, I suspect the poster in question is a rethread.