One thing to keep in mind eugenics wise is that pretty much all the breeding methods we employ for other species are dysgenic - we are producing cripples to our own benefit or amusement.
I assume by 'dysgenic' you mean 'less fit than unbred specimens for reproductive fitness in the wild'. (You couldn't mean 'reproductive fitness' in general, given how many dogs there are compared to how many wolves there are now.)
This seems like an odd point to make. Of course we breed animals to be less-reproductively-fit-in-the-wild - if they were already ideal for our multifarous purposes, why would we be explicitly breeding them at all? (If they were already ideal for eating or being pets or whatever, we would simply capture & use them or raise them normally without any interference in their reproduction.)
It'd be a pointless point if there was a symmetry between fitness in the wild and fitness for our purpose. There isn't - fitness in the wild is very seldom improved by loss-of-function mutations, whereas fitness for our purposes, starting from the species that have been evolving for fitness in the wild, very often is. Rapid success at breeding larger corn kernels is not going to generalize into rapid success at breeding ubermensch.
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.