Most likely not. At some point [I don't think it happens now] an "ancestry family tree" was quoted as a source for many of the NAMES in a file. These had no citation to a particular family tree and was really nonsense. Of course now I forget how I deleted them.. was it one by one? But in any case I do have a few left that are actually linked to particular people in a particular way where I know which family tree it came from and I got rid of the rest.