We can hope but we cannot act against what has been revealed to us and to allow a person to think that they can be prayed out of hell is a VERY irresponsible act.
Then you will have to blame it on the Irish in me and my Irish ancestors in the days when they were Orthodox!
There is no doubt that my ancestors in the faith, from the Emerald Isle, during the millennium when they were Orthodox believed that souls could be released from hell. Take Saint Samthann of Clonbroney
. She was well known for the ability to get a soul out of hell. Saint Aidan of Ferns was also known for this. Praying a soul out of hell was, however, not an uncommon accomplishment for Irish saints; one scholar Lisa Bitel has claimed it to be an "almost exclusively Celtic motif."
So, certainly in the early days when Christianity was fresh and strong they thought that they could pray a man out of hell. Now it may be seen as rather questionable theology in our days, for either Church. Maybe the early Christians were wrong. Who can say? Once again, their old belief places a gentle question mark over some of the things that we have declared certain.
Here is something from the Rule of Saint Maelruain, from the holy monastery of Tallaght. It is 8th century:
"There is nothing which a person does for a soul that has departed that does not help it,
both vigil and abstinence, and singing the intercession and frequent blessings.
Filii pro mortuis parentibus debent poenitere.
"A whole year therefore was Saint Maidoc of Ferns, with all his people,
living on water and biscuit so as to ransom the soul of Brandubh, son of Eochaidh, from hell."