Tax protest organized as a religion:
"Icelanders opposed to the state funding of religion have flocked to register as Zuists, a movement that worships ancient Sumerian gods and – perhaps more importantly – promises its followers a tax rebate."
According to Wikipedia:
'The Zuist Web site says that Zuism "will cease to exist when its objectives have been met".'
I fear we can take it as a truism
that no one's too sincere about their Zuism.