Perhaps we could put a fictitious relative on our trees like the A to Z street index company does with a street. That way we will know who had cloned it
Then there is no point in doing your family history.
If it is so important not to let others use your work don't share it keep it hidden away in the closet and only gloat over it behind locked doors.
Really folks stop being so precious, family history is for sharing, upload your trees to open sites and share with the world. You lose nothing if others copy your work and will gain many fold.
The same goes for living people, in England there is nothing to prevent one adding the details of living people to a website.
They are part of family history and for a tree to be complete need to be there.
Etiquette dictates that no personal details are added so don't add such things as medical conditions or wages.
It is perfectly acceptable to add such things as date of birth, marriage and death as these are public records open to anyone in the world.
It is sheer hypocrisy to prevent such details being added to family history websites when television and newspapers exist and are allowed to report details of people such as the rich and famous.
Cheers
Guy