Ancestry/Genealogy

It has been a pet peeve of mine since Ancestry started bombarding the airwaves with commercials about how easy it is to research your family tree: just plug in your name and all will be revealed! I've been doing this for over 45 years and believe me, it is complicated and time consuming (and a very interesting hobby, I might say). Ancestry and Family Search are useful for access to original documents that used to take me weeks and letters to courthouses to obtain. But I've seen too many errors on subscriber-submitted trees. Don't people proof-read any more? For example, how can a father's birth year be only two years before his son's? Just sloppy, if you ask me. Why would anyone post a tree with such an obvious error? And, when people are electronically attaching to on-line trees, an error is perpetuated.

P.S. In the case of father/son, the father was actually the brother and the birth year lined up with the son's (checked census returns).