MetalPig
Illuminator
A non-belief in stamp collecting?This doesn't work, as a non-belief in Zeus, Santa Claus, pink unicorns, stamp collecting, would also have to be defined as a religion.
I am pretty sure stamp collecting exists. I use to live near a place which I suppose is called a stamp collecting church, where stamp collectionists convened and performed their stamp collecting rituals, which consisted mainly of shuffling bits of paper around.