I pretty much just ignore it to the best of my ability. If really put on the spot it would just be a judgement call to kind of nod-and-go-along-to-get-along, or to do what Otto suggested and just say "sorry, its a new person to me!"
I haven't started playing HW yet, so I haven't had to see just how many people may have done that :-X
I haven't started playing HW yet, so I haven't had to see just how many people may have done that :-X