Yes, I am assuming that these young women are fine citizens.  They have made civil and well-spoken comments here, and so has their father, an eyewitness to this event, and you have dismissed what they had to say.  

I am making no assumptions about Mr Naval  --  it is a fact that he called the minor a foul name, hit her with a stick, and destroyed her cell phone.  That, plus the fact that the stick he hit her with was holding a sign, are about the only facts this article gives us.   We know nothing about the criminal histories of anyone involved in this event.

And yet, from a distance of 2500 miles away, never even having found our town on a map, and completely disregarding the eyewitness testimony offered here in these comments, you instantly made up your mind that these young women were thugs.  

If Naval didn't want to interest and inform people about illegal motorcycle noise, why was he standing on a busy street corner holding up a sign about it?