I just read the article and here's some cynical comments.
A. the headline should be more like 'How to avoid street fight' or something similar.
B. reading some stuff doesn't help a ****. One has to actually train stuff to have it work. Especially in stress situation like street fight.
C. there were lots of stuff that I would call beyond reasonable. Like who the hell goes around and checks surroundings in active manner? Not even cops or soldiers do that on duty.
D. There was some stuff that was pretty obvious. Like people naturally try to prepare themselves if they see a threat.
As a whole pretty decent stuff and some good tips, but the context stays a little unclear for me. To whom this stuff is written for and why?