I agree that many members have switched from a public tree to a private tree for the very reasons you have outlined. I got so utterly fed up with it a while ago that I actually switched to a Private Tree - but then, after a couple of weeks, I thought that this was just giving up on my principles, and the Ancestry principles, that the idea of the site is to share. So I made my tree public again and decided to stick with the solid principle of sharing.
I can see what you are getting at, though.
By the way, I can remember discovering from the Salvation Army what had happened to my Grandfather's long-lost sister - and I wept tears over the letter they sent me. You'd be surprised how emotional I am about the people on my tree.
Doddsie4, thanks for posting this and for sharing your heartwarming story with us.
Having read these posts, and hearing stories from the other side of the fence, so to speak, I admit to being wrong in making the assumption that all private tree owners are being a bit selfish, so I apologise to all for my mistake and thank everyone here for causing me to "see the light".
What really got me into this forum was the woman I mentioned in an earlier post who hasn't let me have a parish record image she has in her private tree, one I could have got myself, if the Medway Cityark Archivist(s) hadn't been so pedantic about applying data protection and privacy "guidelines" so rigorously and stupidly. The woman hasn't had the decency to level with me and say she doesn't want me to have it. That's what's got under my skin in such a big way, her rudeness. If she'd at least said that to me, although I still wouldn't have liked it, at least I'd have known where I stood, instead of just being ignored. Since then, I've found a good place where I can buy a CD or DVD+R with the missing image, plus a ton of others, so that's what I'm proposing to go for. As regards the ignorant woman, well she can do with her parish scan what the monkey did with his peanuts, for all I care.
Sorry to be so blunt, but this experience with an ill-mannered person has upset me as much as have been some of you owners of private trees about people wanting to benefit from your hard-won data (a view, thankfully, I can now appreciate).
Since reading all the different viewpoints, I've come to the same conclusion as Doddsie4, and am going to stick with keeping my tree public. Even
I'd considered going private, after considering all these differing views, but that's not my way. I'm not like that. If, as someone suggested earlier, we all went private, we'd be spending much of our time writing and asking, "Please Sir/Ma'am, can you help me?" - and then getting upset, as in my case, when either being ignored, or having to go through the 3rd Degree, or even being told to shove off. I can't be doing with that. For me, it's always got to be about sharing, courtesy, generosity, and appreciation of the help of others.
I can't see any clear answer to this total problem that would satisfy us all. Ultimately, I think it's down to personal choice - public or private. Minds much greater than mine must have applied their reasoning to this issue, without success. Maybe the boy and girl scientists of "The Big Bang Theory" can help us! I may write them a letter.

Anyway, I'm going to be watching the continuation of this topic with great interest.
Thanks to everyone for taking part.
ATB.
Dave.