Wave is correct by saying we need to choose where and what time we go places. But I understand your point too. Like any city, it isn't blaming the victim by saying we need to make the best decisions as we enjoy our parks and trails. Being female, I am aware of my surroundings and I don't go in isolated areas, so this isn't much different. I avoid parking in dark parking garages, when I leave work in winter & late at night we leave in groups, I lock my doors, including when I drive, I don't let my kids walk to school, hang out unsupervised or spend the night where I don't know the parents.
Also, I don't wear short skirts and high heels and walk down dark alleys by myself. I don't leave my drink unattended in bars, accept rides from strange men, pick up hitch hikers, hang out w/ criminals,  or get into vehicles with drunk drivers. 
Being smart and aware is not the same as victim blaming and it isn't turning over our public places to criminals. If I can avoid danger, I'm all for it.