Mimi- her mother wasn't given a choice. So, yeah, I don't blame her for wanting to go and "kidnap" her back if that is what it took. As for your "better parents" remark....adoptive parents are not "better parents". That is fueling the huge myth that women who surrender children are women unfit to raise children.
to answer the Q:
I know where my daughter's adoptive parents live (they don't know I know, bwahahaha). I have done nothing. As angry as I am with her a-parents and as much as I miss her, I cannot take her from the only parents she knows. But she will know of me on her 18th birthday. Me and her big sis are sending her letters with pictures.