Haven't read the entire thread so hopefully this isn't too much off target...and warning that I feel very strongly about adoption and finding your birth family but this is just my opinion about my life.
I was adopted during the 1960's when many women were forced by their families and society to give up their children. There are many support groups for adults my age who have been dealing with the fall out of closed adoptions. There is a good book written about that era and adoption titled: "The Girls Who Went Away". It's heartbreaking to read about how mothers were basically forced to give up their children. In my upper middle class family it was thought better to rip a kid away from their birth mother than to be embarrassed to your friends and neighbors by your pregnant daughter (who was in her 20's at the time).
Through new state laws I was able to obtain my original birth certificate and now know who my mother is, know who my aunts and uncles are, know that I have a 1/2 brother and 1/2 sister, etc. My father is not listed on the certificate and it will take a DNA test to figure out who he is. Which I plan to do. My father as far as I've been told didn't even know my mother was pregnant.
I am in my 50's. The family secret, or their family secret, is not my fault and not my responsibility to keep. I want to know my ancestry, I want to know my medical history, and I want to feel connected. If my birth family doesn't want a relationship with me, well, that's their loss and has nothing to do with who I am because they don't know me. My adoptive mother agreed and encouraged me to find my birth family and I am thankful for that.
Just posting this because I wanted to represent the other side of the coin - the child - who has no connection to their family/roots/history/medical information. I will respect the wishes of my birth family if they do not want to maintain contact but I refuse to pretend like I should be an embarrassment to anyone just because I exist.