I disagree Ted27... sorry! I think the element of unknown is a big thing for adopters to face and I think many adopters do face it. As an adopter, we knew very little before we adopted. Okay, we should have probably pushed for more information - but I felt like it was at a review meeting where a piece of paper was handed out when I was struggling to entertain our child on the floor where the complete story was handed out and even then it was a bit short. We adopted on the basis that our child was meeting all of their milestones and was healthy and we were only presented with one profile (no picture) and we liked the name and we trusted our social worker, who is amazing. Currently, couldn't be better but I am sure the teen years will challenge us (like any parents). We have a life story book
I think whilst we can know the story on paper, it's very different to actually know the birth family. In our case, we were told it was too dangerous for us to meet with the birth family, so I am sure that if you had that opportunity you would have a much greater picture of the child's background, but I don't think that happens for many adopters. Even then, you're likely meeting the biological parents on one of their worst days...
I did a bit of a cheeky facebook stalk (I know this is slightly ethically questionable but their profile is public and you can see everything), and that told me a lot more about them than any document, and definitely meeting them would tell me more about them all. I don't know how tall they are... I don't know why but I'd love to know. I have asked social workers but they couldn't tell me, they sort of just gestured and told me they were about the same height as me....... small.
There was so much unknown before we adopted, and we wouldn't be here if we hadn't overcome that fear - so I do think it's a valid concern!!!
I do however agree, many families have secrets and I didn't even know my grandparents name until their funeral. One passed away when I was 22... that's an embarassing age to not know your grandparents name, but they were always motima to me (Indian grandma....)....