"What the disobedient Feeney said amounted to this: he insisted that all who did not formally enter the Church would go to hell. Hence he had to say, and he did say, that unbaptized babies go to hell. Further, all adults who did not formally enter the Church - get their names on a parish register - would also go to hell,..."
From "TRAGIC ERRORS OF LEONARD FEENEY" by Fr. William Most