JoMac, you are so right.
Brennancasss summed up Ancestry's main marketing plan well: "I think if Ancestry wants some credibility then they need to address the problem of people who have no serious interest in genealogy or think that this is a short cut to building their family tree." This is because Ancestry.com actively promotes this method of creating and expanding trees: taking what others have posted.
You observed, "I just saw a comment on the boards about how useless Ancestry will become if the "epidemic" of private trees continues, as if the trees are all Ancestry is good for."
Many who think 'research' is plucking 2 or 10,000 plums from others' trees resent not being able to lift some of the less accessible cherries. They think Ancestry.com has told them they have a "right" to all the fruits of others' labor, without ever having to go to the actual records themselves, or even having to ask if they may incorporate an actual researcher's write-up of evidence.
I am delighted to assist anyone who shows some sign of wondering about evidence, wanting to do the research, questioning Widely Held Mistaken Beliefs. But I don't have to publicly post the golden nuggets found in the musty 40-pound
Court records books and spidery basement files.