Imagine getting into an argument and seconds later the person you were arguing with slashes your neck. Let me set the stage for you in this very quick video. You just got in an argument with someone asking them to stop berating the staff. Meanwhile, you stop paying attention to the people around you, annnnnd she cuts your neck.
Evil people exist! People who have absolutely no value for human life walk the streets among us. Perhaps you should be aware and be prepared?
Your mind is your most valuable tool. If you are aware of a threat, you can likely avoid a threat. However, if you are not aware, you can never avoid.
If you are aware of your surroundings you can avoid becoming a victim. Put the damned phones down and pay attention to your surroundings. Keep eye contact and keep distance, it may save your life.
Be armed. Be trained. Be Alpha.