Sorry but this thread isn't getting anywhere.
I think what is behind peoples concerns is (a) the fear that somebody else will take the credit for their work and that they will be "cut out of the loop" (b) that suspect data will become so deeply ingrained in published trees that it will be very difficult for future researchers to make headway
To move forward I suggest we establish and promote informal guidelines for the circumstances under which it is (a) OK to copy a published tree (b) re-publish it
I offer the following for starters
(1) If you really don't want it copied, dont publish it in the first place. (But nobody gets anywhere then.)
(2) A copier should have legitimate reason for copying a tree or part of a tree; a family link, a potential link (e.g. common surname and town), academic interest or compilation of a reference source (e.g seeking to exhaustively catalogue a village), ...
(3) a copier should not seek to gain financial advantage from material offered free of charge.
(4) It is only polite to ask if a tree can be copied.
(5) It is wise to ask; at least you might be notified if the originator subsequently discovers errors
(6) Acknowledge the source; if Y copies from X's GR tree then Y should list it as "secondary evidence from X" or similar; If Y checks it with a census or another primary source and quote that, then that takes precedence.
If that is done, a third person Z can see whether he should try to contact X for first-hand data; If asked, Y should direct Z to X.
Thus X's information is spread (which must be what was intended when it was published) Y can have the data, and Z can get to the originator and knows the provenance of the data
(7) do not reproduce living relatives (say b after 1920) in public forum even if present in the original, unless independently researched and permission granted.
(

If no source is given for data then it is unwise to believe it, never mind reproduce it.
(9)We do NOT want copyright lawyers making money out of family history researchers. There's too much of that already.
G