Well if they implement it with no way for me to not have it in my game so I can experience my game as I want then I will leave and I know quiet a few others who will as well. The last thing BW needs is more people to stop playing.
But you do have the option to ignore it. You just don't pick the Same-sex flirt options. This isn't a difficult concept. They're very clearly marked. If you never flirt with a same-sex npc. you'll never see same-sex content. Simple, easy, non-discriminatory.