it was sora controverisal in teh 80's too I can't remembr if it was the band themselvs or soemeon else taht said it represented questioning of all things relgion, it aws a question mark pointed down meaning to question everything. to the best of my recollection, that is..
but then again back in the 80's practially anything remotely anti-religious came under attack.. Not that it doesn't today..
