The O.O.D.A loop has two caveats, the first that crowds and being in packed lines (like is common for the holidays) make observation extremely difficult. Prioritization of persons of interest will be the best play here. If someone catches your attention, something triggered in your brain to pull them out of the crowd. They may be worth further observation.
In crowded situations, put your phone away, observe and orient yourself in your surroundings. Situational awareness is your first defense.
At SDTG we specialize in helping you stay defense ready. Use this link to Connect with us for the latest trends and guidelines in firearms and safety.