i agree with what you are saying, but its really hard to just walk away when in the subway. Most of the time, if you try to walk away, they get even more aggressive and start pulling that "dont walk away when i'm talking" line.
Looked like pretty much everyone there could have taken the skinny guy down. He wasn't much of a threat.
yeah good point on being in an enclosed environment. The guy was walking away and was pulled back in by unnecessary words....but given that it was enclosed, he probably would've found his way back to them soon enough anyway.