Maby if you are a wistleblower or someone the government would want to keep track of, they may somehow engineer a biological weapon that does not harm but will replicate itself just enough for it to be released from behind and let them know where you are.

You know, if that infamous author hadn’t written Do Not Create The Torment Nexus: A Cautionary Tale, there is an excellent chance the Torment Nexus would never have been built.