Luciana -- Thanks for the interesting thread. As posited by an earlier poster, I believe that the legal prohibition reflects a social taboo; which, in turn, was stirred in part by the "hillbilly" phenomenon of cousins' offspring marrying cousins' offspring that are themselves cousins. And, er, yeah, some seriously scary things resulted. The other piece that may have been--note that I say "may have been", not "was"--involved was trying to keep all the property from being tied up in one family group.
It's hard to see why the concerns of a low-knowledge, limited transportation, limited communication 19th century worldview would apply now. No longer do we have extended families sharing one big family farmhold, where cousins grow up as emotional siblings--which, I think, is the "best" argument for banning such a union, it's emotionally incest exactly as step-siblings are, despite lack of consanguity--and if we do, it is an issue of choice, not physical boundaries to information or travel.
So, I guess if Washington prohibits first cousins from marrying, I'd support repealing that law...but it's far down my list of priorities. There are many more egregious injustices, that affect many more people, on my list.
For instance, I just read that a WA state legislator wants to have the State collect DNA samples (and store the information in a database) for anyone arrested for a felony. Not convicted, nor even charged: simply arrested for a felony! This is an enormous violation of the accused's right to privacy, and implies a presumption of guilt that is in direct conflict with the fundamentals of our justice system.
That's just an example, no derailing intent (I'll take up that issue as its own thread later this week). So, while I do care, I don't care enough to mount a campaign; in fact, I'm not sure I care enough to try to research whether or not Washington State has the ban against such marriages.
We all pick our battles. This is not, at this time, something that engages my outrage reflex enough. Perhaps some grasp of how common this issue is, and how much it is enforced, would change that.
Another, related, idea is that there should be a "sunset" committee that reviews laws to see if they need to be repealed. Of course, members of the public can lobby to have specific laws looked at, so this kind of thing would fall into the "likely to be reviewed" category.
Hope I haven't completely puzzled you, Miss Kitt