The suggestion that if you don't support this you are homophobic is a very weak argument. Whilst I couldn't care less what consenting adults get up to behind closed doors, I do not consider one's sexual proclivities, whatever they may be, to be a matter for public promotion. To have an employer taking such an enthusiastic interest in employees' sexual preferences (straight, gay, et al) is rather creepy and doesn't cover either in glory (so to speak). This is not very dignified subject matter for the Royal Air Force to be embracing, and I am sure many will be as uncomfortable with this event as they would be with the RAF officially attending a 'straight pride' if such a thing existed.