(The following is actually a joke and is not meant to be serious)
Toho, a game with little girls flying in a magical land... the sad part is that they use black magic and many of the characters are demons that look like little girls and have varied satanic powers at their disposal and have often encouraged children to drink alcohol under-aged. The main characters who are supposed to be the heroes aren't out of the clear either, the main character is a Shrine Maiden of Shinto Religion, which would surely lead our kids to stray from Christ, BUT IT GETS WORSE! The OTHER main character is a witch, yes, you heard me, A WITCH!...............
(THE FOLLOWING UNDER THIS SENTENCE IS THE IDEA OF DISCUSSION, THE ABOVE COMMENT WAS AN ATTEMPT TO PARODY THE IRRATIONAL MORAL GUARDIAN)
I'm very glad that Touhou is not so commercial that it attracts this breed of haters, because their insane troll logic drives them to think that even the most irrelevant things mean devil worship (even though some characters aren't that bashful about it, like Remilia, no pun intended, who likes crosses but is otherwise indifferent to religion period). At the same time, I get a good kick of laughter when I read stuff with these people obviously not having a clue what they are talking about, it's sort of that feeling of watching the Joker in Arkham Asylum kick a guard's crotch, it's painful to watch and you may feel hurt, but you can't help yourself but laugh at the sheer stupidity of it. Here's an example that I just read about on Poke'mon, revel in fear of the Metapod, the rarest and most powerful Poke'mons!
http://shelleytherepublican.com/2006/10/01/pokemon-the-yellow-peril.aspx (btw, pardon my lack of knowledge, but could somebody tell me how they do that thing where the entire link is in one word?)
My main idea was something along the lines of creating a fake document that looks something like one of these moral guardians ranting about Touhou (in which it would be made VERY clear that that the whole thing is a big joke). Jokes of any particular characters acting like an over zealous moral guardian sounds fun too (Heck, I might be reading between the lines when I think of Marisa's statement on "Those Tablets").