IMHO, this case will cause more people to look the other way, or pull out there phone and make a video. Who would want to risk going thru all of this?
Those few brave, good people who would consider standing up to defend themselves, or someone else will definitely have to think twice about it.
I would hope that if my mother, grandmother, or daughter was on a train and someone was exhibiting threatening behavior, someone as brave as Daniel Penny would be there to protect them. JMO and maybe others would not feel the same.