You cannot assume any of the trees posted are correct without documentation (I am finding an 80% error rate). If one hasn't already read some "how to" genealogy books then that is the place to start. Learn stumbling blocks, terminology, primary sources vs. secondary sources, how to analyze data, where and what kind of data is available. Or check out scholarly publications, take classes, join genealogy societies & attend seminars if not, then you are up a creek without a paddle. To me it appears that many "genealogists" are more like collectors and not researchers. Find-a-Grave has a lot of errors as do many websites. The problems you mention can apply to almost every family, that is one of the reasons why WikiTree emphasizes documentation and cooperation. It requires a lot of extra time and effort but will be worth it in the long run. Keep the faith!