People are fairly simple creatures who are easily tricked because of their addiction to patterns and basic context cues. People want to trust you, like you, not need to kill you. Heck, you could be an asset to their team if you turn out to be someone they can trust, let their guard down around, and learn to lean on.
We see characters like Daryl on The Walking Dead become fan favorites both in and outside of the show while still being kind of dickish.
We all know having the proper supplies, tools, and even clothes for the apocalypse is vital. We prepare our bodies with exercise and diet, but how do we prepare our mind? How do we ready ourselves for the predators who will use mental tricks and manipulation to assert their will?
I recently read an article about Pick up Artistry or PUA. It's a school of thinking and series of behaviors designed to coach men that women aren't interested in to manipulate, bully, and otherwise deceive their way into bed.
There's a book, The Game: Penetrating the Secret Society of Pickup Artists by Neil Strauss, about understanding and employing this technique that has a nearly perfect score on amazon with about 720 reviews. Overwhelmingly, these Seven Hundred and Twenty people, likely a vast majority of men found topics like "Selecting a Target" and "Isolating the Target" to be valuable information.
Read the book, not to become this kind of person but to recognize them when they approach you, your friends, your daughter. Explain to your friends and relative what it looks like to be manipulated by a Pick up Artist. Every potential victim needs to not only be confident in their own mind and cues it's providing but also aware of what might be churning in the mind of that seemingly vulnerable man who needs help on the other side of those buildings.