It's strange for me when I read stories about foxes because I've only ever known them to be reasonably timid, yes I had to run at one in broad daylight that was sunbathing in the garden next door or it wouldn't have moved but, their rabbit was in a run and the fox wasn't making any attempt or showing any interest at all, my feeling was that this particular young vixen had been fed by someone as she appeared very tame.
I've never heard anywhere other than on here of foxes biting through wooden hutches either - I'm not saying it doesn't happen - just that the only real horror stories I've heard are on here. I think it's worth being really vigilant and taking all the precautions you can but, I am more wary of 'free-range' than when they are in their enclosure. I think outside lighting (sensor) is brilliant - it's a real put off to a fox if a bright halogen light clicks on, they don't know it's a sensor and I think it's scary to them to stay and have a go at a hutch if there is a light on them.