There is an endless stream of experts who will teach you how to avoid being taken hostage, but there are not many “how to’s” on how to take a hostage.
Why would you need to do that? The scenarios in a lawless environment are endless.
One of your loved ones may be held by another group, or you simply need someone with a specialized skill to keep your family alive.
Imagine your family is being held at a FEMA camp and you are able to capture one of the guards. You have them tied up, how are you going to get information from them?
Taking lessons from criminals, learning the methods that result in Stockholm syndrome would transform your unwilling hostage into a friend formed in the traumatic bonds of the moment.
It could be a scary world one day, and you may need to know how to take a hostage to get what you want. So make sure you also learn negotiating techniques.