If you are asking for a quick way, I am not aware of one. I use other members' trees as hints. I never link my Tree or have my Tree linked to another's tree. The only way I have found of protecting my Tree is keep it Private. [I do allow some people in my Tree for bona fide reasons, or give specific directions of where to find information or give the support I have in detail] To add individuals found in another tree, I do it the slow way. If I agree or even sometimes temporary will use, I manually enter that person in my Tree and use the primary (and sometimes secondary) sources the other Tree used if I have determined it is a proper source. (As you may know many trees use an incorrect source to put an individual in their tree.) You can delete a person from anywhere, however if is a double linked individual, you will be creating what I call floating branches. Unless it is your intention, I do not recommend it. If the issue is a wrong name or incorrect event or date. I change the names and dates and delete the event. If I want to reference some person or event that I found in another's tree, I will either link to the same source in Ancestry found in the other tree. If the information is not in Ancestry but in an outside source, I first confirm the accuracy of the source, make a pdf ot jpg for my files, and list as a reference the supporting document(s). Again my way is slow. When I use a temporary person I try not to go far with adding individuals until I confirm or deny the temporary one. However, I have made some major mistakes, by going down 3 generations only to find my temporary person is incorrect. I have had the same thing happen by relying on a "primary" source only to find that source was incorrect. I think I have answered how to get the results you want, but my way is slow. There may be quicker ways to accomplish your goals, but I doubt there is a quicker more accurate way. I would love for anyone to find a quicker way with the same accuracy.