More park violence

Now I know that dog owners don't ordinarily go to parks in the wee-small hours of the morning, but the story of a man being shot and killed in Kenilworth Park early this morning, combined with other recent violence in Portland parks, makes me wonder how safe our parks really are. By some accounts, several parks, like Mt. Tabor, are virtual ghost towns where once there were many people. By closing off the parks to a significant number of these users during the day, are we fostering an environment for crime in the nighttime hours?