False family members and ancestors are rampant among ACOM trees. The most notable part of your post is "If users could be educated...". The newbies, as you referred to, have bought into, (lock, stock and barrel), the ACOM commercials that tell them they don't have to know anything except start searching. Education about how to research, analyze, and evaluate records and information is a must for those who want to trace their families.
There are numerous, NUMEROUS, threads about this subject on various ACOM boards which have been posted for more than a decade and even approaching 2 decades now. I don't know that there is really an answer to the problem except for the more experienced family historians to try to help the new ones when they see a need and opportunity to do so.