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<br>Genetic diversity in any form is always good, because you never know how your environment is going to change in the future. What might seem useless now could turn out useful later. Sure, 99% of genetic mutations are probably useless and those won't be propagated. But that extra percent that stick around will help us evolve (over a very long period of time, of course). I was mostly kidding when I used the word 'freaks'. :] I'm just saying that the occurances of what most people call 'freaks'...those occurances are what keep us adaptable in the face of a constantly changing environment.
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Take bacteria, for example. Say you get sick and take antibiotics. If you only kill 99% of the little buggers, the other 1% will replicate and within 3 days and create 3 times as many germs as were there originally, and all of them will be immune to the antibiotics. It's all evolution, baby. :]
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