The reasonable ones include excessive violence and graphic sexual description.
The unreasonable ones include:
"occult theme or promoting the occult or Satanism," (That would be books like Harry Potter)
"promoting a religious viewpoint" (What, do they want to ban all non-Christian holy books?)
"promoting homosexuality" (Books that deal with homosexuality, mainly directed at teens)
The theme running through all these is not letting people make their own choices. We don't want them to think about any religion other than the one we drill into their heads. We don't want them to be "fags" or "dykes." People like that.... There isn't a word for them. They are cruel, and they are hurting others in the worst possible way: they are opressing their minds.
I'm sure there's teens out there that are thinking about suicide or have turned to drugs and alcohol because of intolerant families. Get a clue, people. Kids don't just "go bad" on their own, they have reasons for doing things. Let us make our own choices, our own mistakes, and we'll probably suprise you.
To intolerant parents: the worst thing that could happen to your kids if you let them think is that they could grow up like you.