The bible states that prayer somehow works better when you get a bunch of like-minded people together. You'd think that with the invention of the internet and therefore the ability for billions of believers to sync up their communication channels to God and send requests en mass, we could easily change things. Things like, oh I don't know, world peace, the end of hunger, cancer, and other needless suffering. After millennia of just a spattering of people here and there asking for a global change, we have now within our means a way to systematically connect all the conduits of faith, and with a glorious roar reminiscent of Horton Hears a Who, simultaneously unleash a massive prayer toward the heavens.
But still nothing happens. Either everyone isn't synced up just right, or not enough people care about the state of things, or too many people are talking to too many different Gods, or -- the more likely answer -- prayer just doesn't work.