Although I do not think that playing Pokemon Go leads directly to acts of violence, I do think there is some correlation between playing the game and random acts of violence. One big issue with the game is that people who are playing are not paying attention to their immediate surroundings causing accidents and potentially acts of violence. This particular person was likely robbed because he was oblivious to his surroundings. The situation may have been different if he had been aware and he may have reacted different if he wasn't so focused on the game. I don't think there is anything inherently wrong with the game, but people are still responsible for their actions while playing and must be aware of their surroundings. If you are not paying attention, there is a higher chance of something going wrong.
Odds are a part of everything in life. Whenever you have millions of people doing the same thing, statistically out of the ordinary events will happen. If you surveyed players of Pokemon Go a miniscule percentage would probably have been involved in a random act of violence. The problem is these days with how strong communication and news discovery technologies are everybody becomes aware of events very quickly, this means all it takes is one random act of violence whilst an individual is playing Pokemon Go and the whole world knows about it. The random acts of violence could have happened anyway when somebody was simply walking down the street, the difference is that wouldn't make global news.
It isn't fair to associate random acts of violence with the game of Pokemon Go. The recent spread of violence and crime should not be associated with the growing popularity and presence of this game although people should be more vigilant in knowing their surroundings when playing the game. Although it does make them more vulnerable to crime and activity, players playing Pokemon Go should not be grouped in with those who chose to commit crimes against them. Random acts of violence should not be associated with the rise and popularity of Pokemon Go.
It is not fair to associate random acts of violence to Pokemon Go because by definition, these acts are random. The would-be robbery victim was not targeted for his participation on Pokemon Go. Rather, he was a victim of opportunity, and the same thing would have happened if he weren't playing the video game.