No, Wilkie, I don't believe you are extra vulnerable because you're running. It's all part of how soceity seems to have become extra cautious, so that lots of children don't get let out to play anymore, etc., etc. I tend to find it's particularly people who drive everywhere and so don't seem to have to interact with outdoors much; they're the ones who think that walking/running anywhere by yourself (or travelling on public transport by yourself) is inherently dangerous and risky. There's nothing wrong with risk management (e.g. not running with loud music on; ensuring that someone will become a bit concerned if you're very late back; etc., etc.) but everything wrong with overkill. Cotton wool, anyone?