All the behind-the-scenes manipulation, which isn't exactly able to hide behind scenes anymore for those who take time to observe.
Never been personally big on the incest idea, especially for procreation. My dreams of daughters involve their friends, not them, but that's just me.
I think even sexuality itself is being weaponized today, however. I've never been hostile to alternate forms, but attacks on healthy procreation would (or eventually will) be where I'd find myself completely alienated by simple common sense. I sense it coming too, just over the horizon. Hope I'm wrong.