| There is no way to know the percentage unless someone actually re-created all the research that people put on there to verify if it was right or wrong.
Those trees are all user-submitted and is subjected to the accuracy of the research of the person who put it on there. Unfortunately, a lot of people do not do research. They find what they believe is their family tree all done up on the internet by someone else, and then copy and re-paste other people's false information. People tend to believe that if it is on the internet then it must be accurate and true. I am very, very cautious when I find that others have branches of my tree on the internet and do not post any sources of the information with it; or if the source was just that they got the information from someone else's tree which also has no primary sources documented; or if the source cited was "One World Tree". It is up to each person to take what they find on the net as a clue and find the facts to support it or refute it. Anyone who adds to their tree information they cannot verify with factual records is foolish and does a disservice to all other researchers out there. That type of "research" can cost others years of time and money trying to chase a lead that was false.  |