Like I said, I think this prayer request thing is just a way of crying out for support.
What do you feel that they should ask for in this situation? Money? Most people need "support" from their friends when they're going through difficult times.
I think that you should ignore those post if they go against your religious beliefs or irritate you. Like Morpheus said to one of the characters after they said that they didn't believe Neo was the one, he said, "My beliefs doesn't require them to".
Or put in your signature line: I don't believe in prayer, so don't expect me to give you any prayer support when you ask for it.