This is not something I am opposed to from a scientific point of view.
We do it with livestock, so why not us?
(Before I accidentally invoke Godwin's law, I'm not saying I agree with the other things the Nazis did or that I agree with eliminating non-eugenic friendly individuals).
EDIT: I actually disagree entirely with eugenics - this was an experiment ot see what happens if you apply plain logic and no ethics to the problem. The number of upvotes was slightly worrying!!! For reference, my daughter is disabled and would fall foul of any appropriate eugenics principles which is not right.