Why document - Part 2 - venting after visiting Ancestry.com

I just completed research for a lineage and am once again frustrated by what is on-line.  People do not appear to be looking at what they post or checking the information they do post.I was looking up information on descendants of Claude Philippe Richebourg and Anne Chastain.  We are quite fortunate to have copies of both editions of Wm. C.  Simpson's book, The Huguenot Trail, which includes some documentation for the first one or two generations in America and then provides numerous lineages with dates and places.  It is a good starting point for anyone who is a Richebourg/Chastain descendant, although proof of the information given does need to be found.As I began to check the information I had, I found several on-line family trees which listed erroneous information - completely undocumented, of course, but things which should be quite simple to spot - such as giving the two wives of Simeon Christopher Richbourg in reverse order and putting birth dates for the children of his second wife, Susan Ann Nelson, during the period his first wife was still alive, but listing them as Nelson's children.  I did write comments, asking in one if something was going on in the family, but don't know what good that will do - the information is already out and probably being copied as I type.  Another tree gave the wrong name for Simeon's grandfather - more difficult to check, but there is a deed of gift which provides proof of the parentage in question.Items like these are not always easy to check, but in the case of the two wives of Simeon Christopher Richbourg, it is simply a mater of common sense.  His second wife probably did not have children in 1853 and 1855 if his first wife did not die until 1860 - of course, anything is possible, but this was not a case of polygamy in South Carolina.  The two children were actually born in 1865 and 1868 - a simple mistake and I make them, too, but  one which should be corrected.Census records and tombstones are available on-line and can be used to check such things- granted those two items are not always reliable either, but further research on the children should provide copies of death certificates which will help - although even those sometimes have misinformation.  I understand why, too, having had to correct my father's death certificate which was entered under his nickname and not his given name, although his given name was quite clearly written on the form.So, what to do - I usually tend to steer clear of family trees on Ancestry.com since they do so often contain egregious mistakes, but every now and then, I check them because if the documentation is included, it is  often easier to copy than scrolling through all the entries offered in the Search field.I hope anyone reading this will take to heart the request to document - it not only helps you, it will help future researchers as well.  Happy documenting.