Chimps aren't typically spayed or neutered, and can be socialized to be around humans, if need be. I'm thinking of Jane Goodall's facility in Africa, or other similar refuges where the chimps' needs are taken seriously.
Their social intelligence makes it possible for them to relate to humans without millenia of specific breeding, but since they are an intelligent and complex animal, it is necessary to respect them as such. Very, very few people/facilities are prepared to take care of a chimpanzee properly for the duration of their (human-length) lives.
In addition, chimps only become available as pets when their families are killed for so-called "bushmeat", so any chimp available for sale has probably witnessed the slaughter of its mother, and possibly its entire extended family, and then has been wretchedly maltreated for some period of time. I view this recent tragedy as par for the course, unfortunately.
I agree with Kathryn - using terms like "slavery" and "exploitation" is right on target. If a human being witnessed the murder of his or her entire family, then was forced to live in a tiny cage for months, starve for long stretches of time, and suffer long and uncomfortable transport and eventual
sale to people who treat him/her like a resource or a pet, we'd understand why they might go nuts. It's no different with any other primate.
