I hope you realize the difference between a "gut feeling" based on actual actions like posing vulgar racist threats against your family and photos with firearms by that man vs a man entering his building without (as far as we know" any attributes that would lead one to believe an he is doing anything nefarious (aside from being black). Yes, this woman is a hero for following her gut instinct, but that's because her gut instincts were rooted in intelligent thought and her actions were appropriate (go to the police).