Baa-Baa, Black Sheep
If you search your family history long enough, sooner or later you'll turn up a black sheep. Who is your most rascally, rebellious or notorious ancestor? What did he/she do to earn that reputation?
On a more serious note, sometimes you turn up an ancestor who has acted in way that brings shame on the family. I'm all for full disclosure myself, but when I discover something that makes me cringe I add a personal note to say how I feel about it.
How will you handle this issue when it comes to documenting your family for generations to come?