My great-great grandfather, Alonzo Morris Buck Sr., has the project protection label. I'm guessing it's for the Civil War project, but it doesn't say. I don't see a good reason for this: while he did serve during the Civil War, his service was not particularly notable in any way to my knowledge and he's not historically significant, there's no controversy around him, and no one trying to create duplicates.
Also, while the project protection description page says that the project is the manager, that's not true for him--I'm the manager.
edit: adding the Civil War tag because I can't think of who else would've added a Project Protection label.