If everybody would STFU about what they do or don't believe, this world might be a bit more tolerable.
Right up until it mattered, and you suddenly find out that guy you were counting on to be sane considers himself half cat, half dragon, and half angel -- three halves of retardation.
Fucking leprechauns? Scientifically proven, existing on another energy layer? STFU for all time. That's not so much a belief system as a masturbatory slow-motion cry for help jotted into ones diary in comic-book format and 'accidentally' shared with humanity. With a belief system that includes cartoon characters, if you have any obligation to the rest of the world, it's to stay out of the way and to not touch anything important.
Me, I'd much prefer everyone wore their beliefs, biases and quirks stamped right onto their foreheads, so I don't confuse the companionably crazy with the destructively crazy.