This is one of my pet peeves!
As you can see I credit everybody involved. On occasion I may mis a credit because I know that model is credited elsewhere in my port.
I often see UK photographer's ports without model credits. I'd love to shoot with some of these models and it frustrates me that I don't have any easy way of contacting them.
Recently I sent a PM to one such photog and asked him if he could tell me who 'such and such' a model was in his port because he hadn't credited any of them.
He wouldn't tell me - his excuse was that once a model he'd credited was booked by another photog after seeing her in his port and she had a 'bad' experience with him. So now he doesn't credit any of them.