I let my kids read whatever they want. I just them to read! So far they haven't read anything out of the ordinary.
One other religious oddity. Another family that lives in the neighborhood will not let their kids watch most cartoons especially Spongebob Squarepants. Their rationale is that since sponges can't really talk it must be magic which is the work of the devil. I've actually heard this firsthand. A lot of fundamentalist types live around here.
My kids watch Spongebob and so do I.