Well the might not completely slice of the nose but it would probably probably take of a good few layers of skin or at least be incredibly sore. Trust me on this. I have a funtioning bow with ours and that damn string has left many scars on my arms
At worst all that'll happen is a little redness on your nose. You won't even skin it unless you keep doing it and if the pain isn't enough to dissuade you from that form then you probably deserve the skinning.
anything to say?