Important information to remember when interacting with anyone you don’t know.
Applied situational awareness includes managing contact with people you don't know. You have to pay attention to the space around you and maintain it. That space can keep you out of the other person's reach and also give you time to react.
Combine the tips demonstrated above with the palms-out hand fence and an orbit move and you will likely deter most bad guys because you're not acting like a victim.