But what really did upset me, a few years ago:
Being "green" at this sort of thing and not knowing how to send a partial GEDCOM to anyone, I sent my GEDCOM to a recently-discovered cousin, not anticipating that he would merge it into his family tree programme. But he did and then sent his GEDCOM on to someone else. I shall not put the someone else's name here, that would be wrong, but that person has a site into which all details sent are included. One could say what's wrong with that? it was sharing. I am happy to share with people but I was not at all happy about all the information in my family tree being included in that site. It included living people's details, all the notes I have, not just census, not just what can be found in the public domain, but personal information known only to us, such as nicknames, people's hobbies, that sort of thing. It caused a rift in my family when close relatives learned of this. I attempted asking the owner of the site to remove the information. After much time and arguing, when I was told that the people whose names were there had to do the asking (babies can't do that nor can anyone else who didn't know their names were there!), names of living people were removed (I hope), but the personal information is still there.
I learned my lesson and since then pass on information by descendant reports that I have carefully edited.
