I get the same on a couple of car forums. I sent one moron a couple of photos of my car's engine bay to explain a point he'd quizzed me about. A few months later I found them copied onto another forum where he claimed the photos as his own and was giving others advice on the same subject as if he was an expert.
However, as far as flying for a living goes, the current attitude seems to be "If you're nearly 65, teach me everything you know, stop whinging, retire quietly and then move over!"