You are correct in that FAG is free worldwide to anyone who wishes to post online memorials to their deceased loved ones, and Yes, it is that contributors "choice" to post it on Ancestry for "all the world to see". However, In reference to your statement "BUT I do not want the info I have posted for my dead relatives, including my sometimes emotional feelings, gobbled up wholesale by Ancestry and then sold worldwide for a fee" you are a little late.
Ancestry is already linked to FAG (this would only have happened if FAG agreed to and allowed it) for researchers to link to their decease loved ones.
It is sad that you make that statement as it sounds as though YOU don't want to connect with possible relatives. If so, perhaps you should not have posted your memorials on FAG at all. It is the best site for posting and finding loved ones and I commend the site owner for creating so that those of us who live long distances away from our deceased loved ones can at least go to FAG and pay respects to them by posting messages and seeing their headstones.
If your memorials are private and personal, perhaps they shouldn't be posted for "all the world to see". No one on this board even implied that FAG was "For some folks FAG may be "just another" source of birth and death records, but it is much, much more for a lot of us".
The ability to be able to locate deceased loved ones is a wonder to family historians everywhere. I know that it has helped me tremendously in fixing in on where a loved on last lived when I had 2 or 3 different locations for them.
I just hope that I never become as selfish when sharing my family tree with others.