Given that in certain parts of yahoo America, they still ban books like "Huckleberry Finn" and "Catcher in the Rye" from public and school libraries, I can imagine the report from a typical citizens group if presented with all the DW books to be considered for inclusion.
1. Colour of Money/Light Fantastic/Interesting Times/Sourcery/Eric: All out. Full of occult magic, and claim that other gods besides Jesus Christ exists.
2. Wyrd Sisters/Witches Abroad/Lord and Ladies/Carpe Jugulum/Maskerade: All out, because they witches are treated as people who work for the good of humanity, instead of the devil-worshipping evil women they really are.
3. Pyramids: Out entirely for assumption that other gods than Jesus exist.
4. Small Gods: No explanation necessary.
5. Thief of Time: Totally out for assuming that anyone other than God and Jesus control time. Also, improper use of Four Horsemen, since they don't precede reappearance of Jesus.
6. Equal Rites: Out because it's more sorcery, plus use of magic staff with life of its own. Only Moses can use a magic staff, because his is powered by God.
7. Going Postal: Totally out because main character is a thief who doesn't repent of his sins through prayer to Jesus. And he makes offering to false gods.
8. Making Money: Totally out because main character prays to the false god Anoia to save him and is saved by this false goddess. Also implication that main character appears to be having improper relations with his fiance before marriage.
9. Monstrous Regiment: Totally out, due to the abomination of cross-dressing and prayer to false gods and prophets.
10. The whole Tiffany Aching series: Totally out as it advocates for seducing young girls into becoming witches.
11. Hogfather: Totally out because narrative assumes that it is people who create gods, rather than the other way around. Plus, Hogfather holiday demonstrates no religious reverence.
12. Mort: Totally out, as main character works in the service of Death.
13. Reaper Man: Totally out, as it has inter-species romantic relationships and shows agents of God (Death) shirking their responsibilities. Also creates unnatural character of Susan who is semi-devine without being granted this status by God.
14. Men at Arms: Totally out because of bestial relations between humans and undead creatures.
15. Feet of Clay: Totally out because of inanimate objects being given life and sentience by a being other than God. Plus, gender hiding.
16. The Fifth Elephant: Totally out due to portrayal of vampires as positive, helpful creatures rather than the demon spawn of Satan. Plus, it features a talking dog whose talent was granted by magic, rather than God.
17. Moving Pictures: Totally out due to dog that speaks because of his proximity to occult magic, rather than having been granted this power by God.
18. Thud! Totally out due to presence of unrepentant stripper who has an unnatural relationship with a man of interminate species. Plus it features athiestic thought in the form of dwarfs who deny that their God actively guides their lives.
19. The Truth: Out due to portrayal as a vampire as being reformed without clear statement that his conversion is possible because of a belief in Jesus. Plus, the villainous characters are offered reincarnation after death rather than being sent to Hell.
20. Night Watch: Out because the main character runs around naked at the end.
21. The Lost Hero: Out because characters attempt to use scientific exploration to understand the world, rather than accepting that the world is at is because God made it and that's that.
Leaving (I think) the only acceptable books:
21. Soul Music is acceptable if the Death character's name is changed to the Angel of Death. Acceptable because main character dies as a consequence of his actions in popularizing the use rock and roll music.
22. Guards! Guards! Although villainous character uses occult magic to create a dragon, he is defeated in battle. Main character, a slovenly drunk, is redeemed by his heroic actions.