Yes,something like this has often happened on this board in the past - sb starts a thread and then lies low.The original poster 'doctorg' has vanished into thin air,it seems!But then a poster 'Jay Gee' surfaces all of a sudden from the depths!
Maybe some posters don't have enough to do at work,so they choose to utilise their spare time posting about some subject that will evoke differing responses that make some posters angry with each other!I'd say bad manners indeed.Get a life,'d...g' or 'J...Gee',that's my advice!