The Catholics have turned Mary into some kind of saint, whereas apart from the virgin birth tale, the gospel writers don't mention her much at all. Even that son of hers doesn't seem to have included her in his group of disciples. The idea of going to a confessional and being given hail marys to say, the number depending on how naughty you have been, seems like superstitious nonsense to me.
The Bible doesn't say anywhere that Mary was a saint o that people should pray to her. On the contrary, it says very clearly that all prayers should be addressed to God.
Praying to Mary instead of God is something that the church came up with and has no scriptural base.