I would have to say yes they are necessary as it goes towards design and craftsmanship and shows how well the hooks are placed and how they hang...its part of the plug. Is there a reason you don't want hooks on it?
The contest plugs are not to be touched, picked up or fondled at all. Drooling on yourself is recommended but we do try to keep paws off not only because we do not want to damage someones work but trying to avoid five finger folks from helping them selves.....hey it happens!