I don't see why most of these animals would make bad pets.I fully understand why Meerkats are bad pets, but what I don't understand is why you consider species such as Civets, Marmosets, Skunks, Maras, Raccoon Dogs and Pigs to make good pets.
Civets: When tame, it is similar to having a pet cat. They are affectionate and quite easy to care for (except you need to provide lots of fruit). I have seen many videos of pet civets and have friends with civets, although I would not have one if it was not tame.
Marmosets: Again only if it was tame and I would keep it in a large spacious enclosure, they may seem bad as they require a lot of care.
Skunks: Would be a bit like having a dog, it can be walked and is very affectionate like a rabbit.
Maras: They make great pets apparently, much like a dog as well, however I would keep it in an outdoor enclosure with places to dig.
Raccoon Dogs: Only if it was tame. Would be similar to a dog, however it cannot be taught tricks and should be kept in outdoor enclosures.
Miniature Pigs: I don't see how they make bad pets, however I would keep mine outdoors and the pigs would be supplied from Pennywells Pigs which are 0% potbelly (potbellies can be aggressive).
Most of the animals mentioned have been on programs such as Pets 101.