It's already been said by the more sane people in this thread, but I can't see any benefit to eugenics. Let's be honest, in the effort to weed out the "undesirable" (however someone would define that) traits in humanity, we'd still have horrible things (rape, murder, insanity, taxes) in the world that aren't
Not to mention, forcing
sterilization upon someone is one of those breaches of human rights that I'd equate with murder, rape, slavery, and torture. Maybe I'm being a bit extreme here, but it's a pretty heinous way to defile someone to completely take away one of their natural human functions.
And before someone chimes in with this again, no, I don't even think that rapists deserve sterilization. They're horrible human beings, but they're still human beings, and that's enough for them to still deserve the same very basic God-given rights as everyone else.