When I started riding the bike trail between home and work or GFs a few years ago I wondered how safe it was to ride at night. This trail runs under some big high tension power lines, and is part of the half block of mainly level grass field that is between single family homes or apartments. I asked a cop one day about problems on the path and he said they get called out to this area fairly often at night. We were talking after I had called them when I found an unconscious person next to the path (he was a regular, one of the other cops had memorized his social security after finding him passed out and drunk enough times), and I haven't seen them out there again in the 6 years or so since then. I haven't felt too nervous riding this trail in the dark either, bright lights and confidence tend to get others to stay away.