I believe that while feeding is live is a hugely bad idea, and I won't do it unless I HAVE to, the risks are minimal if I use a young prey item (or stunned) and am there to observe at all times.
I have fed one female CRB a couple live sub-adult mice (succesfull!) and she now readily takes f/t rats. I was so worried when I did it, I sat there staring at her, ready to dive in and save her! lol, I'm surprised she ate with me watching like that :]