I don't follow? Even if vegetarianism is highly negative starus, the word's useful as a way to communicate your pre-commitments. Again, imagine the person who eats meat once a week attending several events per week where they will be expected to eat meat. If they don't call themselves vegetarian, they won't be able to keep their commitment. This says nothing about how much status they are gaining or losing, or how much they are 'conforming'.