Those are aggressive acts. If you act aggressively toward someone you can generally expect them to act aggressively toward you. Behavior correction and attitude adjustments come in many forms, some physical.
What is aggressive about walking outside anywhere at midnight? It may be an unfortunately unfortunate choice or condition, but it isn't aggressive. Getting drunk, losing awareness and talking to an attached woman is not an aggressive act, even if it is three kinds of dumb. Why should looking at another human be met with a fist? It isn't like our IP is good enough to hit someone with a glance.
Those actions may be cause for a conversation, not a conflict. I think that humans are complex animals, we have a huge capacity for violence and a brain that cannot always figure out when the violence is appropriate.