"Pox packages," child abuse, and the violation of federal law from "Respectful Insolence" blog.
I have to say: As someone who has never had chickenpox, and who never received the vaccine, the idea of contracting the disease from a piece of mail that just happened to be sorted alongside one of these nutjobs' packages gives me the screaming heebie jeebies.
What kind of lunatic responds to "This is a federal offense to intentionally mail a contagion." with "Tuck it inside a zip lock baggy and then put the baggy in the envelope Don't put anything identifying it as pox."?