Ancestry has yet to address the real problem with this site and continues to ignore, probably because of the huge profit it is making, the climate of misinformation it envitably creates by not tackling those who use the site simply to have a bit of fun.
Ancestry actually prohibits people with a serious interest in genealogy but who are just starting out. Some of these individuals may have a genuine connection or common ancestor to other serious members and possess information that would be mutually beneficial. Since those who are the real deal are forced to make their trees private because of the abuse by others, it prevents serious beginners from making contact with them. What is left is a whole catalogue of misinformation created by people who use the site for a "laugh".
I believe if this site did "what it says on the tin", so to speak, we could have a tremendously rich and mutually beneficial genealogical resource. As it stands for the serious genealogist it is only usful for record searching and nothing else. My advice to people who are serious about genealogy is to take everything you find here with a pinch of salt and use it only for searching records because that is all it is good for.
Check out the following attachment which is a prime example of the wide spread abuse of family tree information prevalent on Ancestry.com and its sister sites.