I've started my own tactic with this type. I just ignore them. Don't rise to the bait. This works very well with children and I can't see that it shouldn't work just as well with adults who behave in a similar manner. As I've said before - sometimes a post of that type gives pause to look at my own point of view and to check on its validity so can be of use but if it looks as if someone is just trying to yank my chain then why give them the satisfaction of a reply?