G. K. Chesterton said (possibly apocryphally), "When people cease to believe in God, they do not believe in nothing; they believe in anything." Few things illustrate this better than this phenomenon. No, I'm not referring to the phenomenon of the "orbs", I'm referring the phenomenon of those who believe that they are the work of aliens, or ghosts, or fairies, or what have you.
For those not sufficiently game to click, the Wikipedia article refers to a phenomena where strange circular objects appear in photographs. Scientific types attribute it to dust, rain, or other particles in the air interacting with flashes, or otherwise some trick of lighting. True believers though are convinced that spirits are trying to communicate with them through the orbs, or that they are spirits trying to protect them.
It is amazing to me in this day and age that people can buy into such stuff, and be so convinced of junk spirituality. Though I suppose that many scientific types would say the same about us and our faith.