I never did get it. Is God so (pick one) blind, dumb, arrogant, confused, uninterested...that he needs to actually hear people beseech him for help before He'll actually do anything to help?
Or how about when people group together and all pray for one thing? Is it kind of like a barn raising? Get enough people together and the chore goes along easier? Exactly how many people must ask God something before he'll do it? Does he pick and choose? How about prayers that are for diametrically opposing ideas? Prayers for things that are mutually exclusive?
Does a very pious person's prayer trump a less pious person's prayer?
I guess these questions are best put to religious persons....