Arguably, we already do - genocide for the first one, and eugenics for the second one.
The problem is that "eugenics" doesn't distinguish between positive and negative eugenics, nor does it imply anything about consent. The latter is serous, not just because consent matters, but because there's been a history of involuntary and frequently covert sterilization of low status women.
I've heard the high level of incarceration of black men in the US called genocide because it takes those men out of the mating pool. It seems like overblown language to me, but the premise doesn't seem totally implausible.
A long blog post explains why the author, a feminist, is not comfortable with the rationalist community despite thinking it is "super cool and interesting". It's directed specifically at Yvain, but it's probably general enough to be of some interest here.
http://apophemi.wordpress.com/2014/01/04/why-im-not-on-the-rationalist-masterlist/
I'm not sure if I can summarize this fairly but the main thrust seems to be that we are overly willing to entertain offensive/taboo/hurtful ideas and this drives off many types of people. Here's a quote:
The author perceives a link between LW type open discourse and danger to minority groups. I'm not sure whether that's true or not. Take race. Many LWers are willing to entertain ideas about the existence and possible importance of average group differences in psychological traits. So, maybe LWers are racists. But they're racists who continually obsess over optimizing their philanthropic contributions to African charities. So, maybe not racists in a dangerous way?
An overly rosy view, perhaps, and I don't want to deny the reality of the blogger's experience. Clearly, the person is intelligent and attracted to some aspects of LW discourse while turned off by other aspects.