Connie Lenzen writes in The Columbian about an area of genealogy research that can be difficult – the family history of those who are adopted. Genealogy research concerning adoptions can be difficult because, as Connie points out, records were sometimes modified to protect those involved.
If you are curious about how and if you can publish scanned copies of original documents (or even just first generation copies of original documents), such as, to take an example from the article, the birth certificate of a great-grandparent, DearMYRTLE has written an article covering the issues involved with publishing these documents (legalities, ethics, standards, etc.).