If that is NWA policy then he did the right thing. Your friend should have grabbed his razor and ducked into the lav and shaved. Captains have enough going on without having jumpseaters put them in a position where they can get in trouble for a violation of the companies FOM. When you show up asking for something you should error on the side of being conservative. Your dress and personal appearance should leave nothing to be questioned. Makes it easy and simple for everyone. Showing up any other way shows a lack of maturity.