I regularly see posts from a friend of mine on Facebook asking for people to pray for things occasionally. Now while I am sure they are more or less posted with the expectation that all of her friends are Judeo-Christians, what she has instead is one Wiccan grey witch.
To be sure I do not mind praying for someone, I feel that prayers should have purpose regardless of your religion.
Whether your worship Yahweh or Omikami Amaterasu, if you are to intercede on someone’s behalf, to have the ear of a deity, perhaps you might want to know what you are going to ask for. For prayers are like spells really, unlike a spell where one is guiding the energy and releasing it themselves so they know the outcome ahead of time, with a prayer you are asking a deity to work their will to your benefit. (If you are praying for something.)
This can be a MUCH more powerful then a mere spell, even one more powerful then a coven could mange potentially. I feel that before you activate such a thing it should have purpose behind it, just as one would with a spell. For if you do not know what you want how is a deity supposed to? And even if they could know, why would you want to bother such a scared being without being clear?