I'm guessing you aren't... people have to draw lines somewhere on this. There's a difference between restricting by age, making available to all and actually assigning material to children. Not all materials are appropriate for elementary school libraries. And I'm not even talking about The Color Purple specifically.
Also, none of this stops a parent from buying a book for their children they feel is appropriate for their child.
I think the law that the judge is ruling on here does not effect a ban of penthouse or similar material in elementary schools. The preexisting laws already had that kind of material banned in elementary schools.
Not everyone agrees as to where the line is for "common sense" and will definitely push boundaries beyond what a community would generally agree to. Laws at a higher level are just "common sense" codified.
Not all mountain out of molehill arguments need to be engaged with I think is the broader lesson we need for our times.