I'm not RC. I am a Baptist.
However, the apparitions that are supposed to be Mary and the doctrines that have developed around Mary come to mind. I only know of Scripture giving one example of humans coming back from heaven and that was Moses and Elijah being with Jesus. I have never read in Scripture where Mary is coming back to help us.
And with regard to mariophobia of some late Protestants, this prophecy comes to mind:
when the dragon saw that he was cast unto the earth, he persecuted the woman, who brought forth the man child: 14 And there were given to the woman two wings of a great eagle, that she might fly into the desert unto her place, where she is nourished for a time and times, and half a time, from the face of the serpent. 15 And the serpent cast out of his mouth after the woman, water as it were a river; that he might cause her to be carried away by the river. 16 And the earth helped the woman, and the earth opened her mouth, and swallowed up the river, which the dragon cast out of his mouth. 17 And the dragon was angry against the woman: and went to make war with the rest of her seed, who keep the commandments of God, and have the testimony of Jesus Christ.(Apocalypse 12)