Wait, nnmartin, how is incest with a regular sister wrong, but it's okay with a step-sister? Isn't the supposed morality pretty much the same thing? You are still siblings, even if you aren't related by blood.
I'll be honest, i read the first couple pages, and couldn't even imagine taking the time to actually read all 45 pages of comments, so i'll give my opinion, and try to respond from there.
In my opinion, incest isn't morally wrong. That is of course ignoring any coercion, molestation, ignoring age boundaries, and outright rape. Essentially, as long as the two people having sex are near the same age, aka, teens with teens, adults with adults, and there was no force involved, i don't see how it could be morally wrong.
Now, society views it to be wrong, and i imagine that has something to do with the birth defects that can arise from it, and the fact that most people simply don't look at their family members as people to have sex with. It is, in a way, linked to homosexuality. Essentially, it's two(or more) consenting adults, having their own particular sex. The health issues don't matter, because they are adults, and can do what they want.
It really does seem like most people who are against it aren't looking at it from a purely pragmatic point of view. They are taking a hate mentality to it. They personally don't like it, it disgusts them, and thus it should not exist. You do realize that your hatred of incest, and your desire to ban it, is, in ways, similar to racial extremism, right? How? Well, let's take the klu klux klan as an example. They hate black people. They want them to not exist. Unfortunately, they can't get rid of them, so they will make their lifes miserable, ban them from places, etc. and so forth. This may seem like an extreme comparison, and in reality it is, but there are similarities, are there not?
Now, i will say that keeping teenagers from committing incest is fine, due to the myriad of issues that can arise from it. Honestly, i would expect caring parents to try and keep their children from buggering each other, if they are aware of it, because incest isn't a particularly healthy thing, either physically, or i imagine, emotionally. It's just one more thing that you would try to protect them from.
I repeat though, if two(or more) consenting adults want to have sex, whatever kind that may be, why does it matter whether they are related or not? As it's been said, we do have various types of birth control and condoms, that would help avoid children. With that worry pretty much out of the way, it's just some adults giving each other pleasure. And really, what's so wrong about that?
Is it really so wrong, just because you are personally uncomfortable with it? And before you try and say, "no, it's wrong cause many people are uncomfortable with it" realize that an appeal to the majority does not make your argument sound, by any stretch of the imagination.
So, What i'm looking for here, those who would ban incest, even more so than it already is, lol, is for you to prove what about incest is so wrong, that we need to forbid people, the few who actually do it, from having incestuous sex. I will not deny that there could be birth defects, in the event of a child, or that there could be emotional issues involved, but again, are these issues so big, so important, that we should protect people from themselves? I mean really, it seems to me, that most people accept it as something they shouldn't do, and that to try to ban it or illegalize it, is mostly pointless, and simply a petty action by those who desire some kind of perfect world where what they don't like isn't allowed to exist.
Still sounds kind of like a hate group thing to me.