Perhaps, but I wonder if the point of the tournament is less about combating discrimination and more about challenging stereotypes - specifically that gay men are not man enough to play contact sport. I think there have been very few top class rugby players who have publicly come out. Gareth Thomas being the one exception, and I recall him being interviewed and he said that he felt very uncomfortable being a gay male in rugby. I think a far healthier situation would be one where players and fans have no issue with another players sexuality. I have no doubt at all that there have been a considerable number of gay All Blacks and gay Wallabies, and probably there is at least 1 right now.
On the gay RWC, I have got no issue with it, and I hope that one day the subject won't even matter.