Look, you know I live near South Bend, IN, an area that has horrible situations with crime. None of our rails to trails have any noticeable crime as of yet. Last year, they converted an abandoned rail grade to a trail through one of the worst neighborhoods in the area. That's the first one in a high-crime area. So we'll see how it goes in the next few years.
Personally, I think that by opening up the area from the undergrowth, putting in lighting, widening the sides, makes it LESS attractive to crime, VS an overgrown hidden path where people can sneak up behind other people's properties.