My problem with this is that the controversy surrounding the name of the dog detracts from remembering what they all did. It is difficult to have a discussion about the Dambusters without it coming up somewhere (ooooh they are remaking the film, what are they going to call the dog?). Like it or not the word is now controversial and deeply offensive to some so it is probably time, not to 'erase it from history' but to at least try to remove it from things that are obviously in the public domain, if that means taking it off a gravestone then so be it. However if someone asks what the name of the dog was there is no need to lie and I wouldn't want to see the name removed from books on the subject or of course from historical records.