Violent Attack, Breaking Down the Pre-contact cues

This video recently generated some buzz on the PDR Facebook forum as a means to generate ideas from individuals in the self-defense world. The scenario is that  the girl with the gray sweatshirt (we will refer to her as "Gray") supposedly bashed the other girl ("Red Hat") on Twitter. 

Tony Blauer asked students/coaches to take a stab at the following questions:

1. What's the moral? 
2. What are we learning as humans/coaches? 
3. How are we (you) as coaches turning this into education/lessons? 
4. What's the problem with 'just' cataloging' pre-contact cues? 
5. If she hadnt attacked her and they just spoke would you have seen the pre-contact cues?
6. What was the most important pre-contact cue? 

Let's not over-think this one. Here are my personal answers.

1). Don't trash-talk about people on social media 

2). If you DO bash people on social media and they show up to your doorstep, they are probably not there to sell magazines. If they show up to your house ANGRY, accusing, AND having an additional person filming the event, beware!!

3) Pre-contact cues:

a) The first pre-contact cue to this attack was when Gray pressed <enter> on submitting the insulting/harmful comments on social media.

b) The next pre-contact cue was Red Hat showing up at her doorstep.

c) Red Hat showing up to Gray's house with a friend FILMING the action. Who does that!?!

d) Yes, physically, you can see Red look around for witnesses then position herself closer for the attack as well.

4) It is important to understand the scenario, in this case the root of the problem and how far Red Hat was willing to take things. This entire event was avoidable.

6) I couldn't hear the audio to know what was said, but given what we supposedly know about this scenario, the arrival the aggravated party on Grey's doorstep was the most important pre-contact cue.Your feedback is welcome! What are your thoughts on the questions above?