Astaroth wrote:
It's also a violation if you ban a woman to marry her little Fido, even though Fido was the first to engange in a relationship.. booo-hooo

it's not fair!!!!
I can't wear a diaper around my head either while walking down the street nude - it's a violation of my personal freedom - and i'm not hurting anyone!! booh000
Eh, actually, those two are very bad analogies. Did you read anything I said? Dogs are not human adults who can give consent. Cousins are. I stressed this several times. You are going down the same slippery slope as the anti-gay marriage advocates. If you can remember, I shot down that slippery slope in the first post I made in this thread.
You cannot walk down the street naked while wearing a diaper on your head because actually, it is considered hurting people by law. I think you should be able to do it, but prissy miss lawmakers don't.
You are definitely splitting hair as far as genetic control goes. You forget one important factor - genes from the mother work together with the genes from the father. Two perfectly normal people can create monster children even if they are not related. You are thinking of old-fashioned single-person focused control. I'm thinking anything that has to do anything with prohibiting anyone from breeding on the basis of genes, combinations of genes, phenotypes (the phenotype-genotype relationship is not always regular y'know). It's still genetic control, just not the kind that was practiced in Hitler's Germany. You seem to oppose one kind of genetic control and side with another. I do not see a relevant difference between the two in terms of violations of rights to self-determination.
You see, there is a roughly 2% chance of passing on genetic disorders when the parents of a child are not related (as in, 4th cousins removed or further). This is an average. Say, a couple goes in to seek genetic counseling. They are unrelated. It just happens that through an accident of genetics they have a 7% chance of passing on genetic disorders to their child. This is higher than it would be in the first incident of first cousin marriage. Would you ban them from having a child together? Should they just break up then and find other partners?
Incest is banned for two reasons. One is social stigma to children, which is a circular argument along the lines of 'this causes social stigma, let's stigmatise it further!' and the other is the genetic argument. There is no fair reason to ban incest. It is a formalization of a taboo. However, it is a practical law. You do not need to provide people with genetic counseling to find out that they are related most of the time and the masses (you included) love it. It's the kind of eugenics the public loves and accepts and doesn't really think much about.
heatseeker - think of early abortion as late contraception. A baby does not exist yet, it just happens to be a little further along the way to becoming one. Afterall, I am a potential PhD, but that doesn't mean I should have the rights of a PhD and killing me wouldn't be the same as killing a PhD.