text: I'm not sure what you mean when you say the Ordinary Form isn't protected. It is the only liturgy one is likely to encounter in the vast majority of Catholic churches throughout the world. The Tridentine Rite is the most vulnerable as it can be banned overnight at the whim of the Pope as happened to the Friars of the Immaculate.
  Those who follow the Tridentine Rite are more likely to have a Catholic understanding of the Mass than those who attend the so-called Ordinary Form.
  Near me a group of Irish schoolchildren visiting England attended Sunday Mass at an Anglican Church which advertised its Sunday service as High Mass. The vicar, a friend of mine, told me that they left at the end completely unaware that they had not attended a Catholic Mass.