Ringoringa
I don't believe in mandatory eugenics for whatever reason, as these things tend to go very quickly from "only people who risk giving their children horrible diseases or disorders" to "let's sterilize all Muslims because ******** 'em."
That said, I think it's incredibly selfish to have biological children if you know there's a high risk of passing along something horrible to them. I, myself, will never voluntarily have kids because of my paranoia and anxiety issues, both of which I inherited from my issue-ridden dad. (I can only pray that by being aware of the behavioral problems plaguing him, I can avoid them myself.
gonk )
I think it's fascinating we as humans can do these sort of things. Hitler would have been so proud. So you're right it can get ugly quick.
But you shouldn't be afraid of having children for fear of passing on certain qualities
sad I hope you'll change your mind one day.