This peculiar illness strikes those who, after seeing
The Craft or the like, think "Wow!
Magick is
cool!" and immediately drag out the chalice and candles and knife-they-use-as-an-
athame and expect to be able to fly and summon
Lucifer. This condition usually lasts until someone whacks them upside the head with a
cluebat or until they actually manage to
do some magick, which usually makes them
run home to mommy.
Oddly enough, IWS is very close to, and sometimes a precursor of, MegaPagan Syndrome.