Identify and Avoiding the Cameroon Pet Scammers

Have you been told that someone individual doing missionary or other work in some exotic location needs to rehome their poor little pet? All you have to do is pay shipping (and maybe a paperwork fee?). Don't believe it for a second! What are the "Cameroon Pet Scammers"? How do you know if you've come across such a scam? Find examples of this scam, and tips and tricks on how to deal with it.