LoveUniHate Exams,
"If they're freed, and live elsewhere, should the chimps pay rent?"
They can be freed in the African forest.
As for personhood that is a question that really has no answer. For instance, and I realize they're extinct, are different species of human beings considered persons? How about Neandertals; Homo Heidelbergensis (more primitive as I go along); Homo Erectus; Australopithecus?