"...because what if children see it?? ..."

[haele]

3. If children see it, they can decide if they want to read it...

They're not going to read a book if the subject doesn't interest them or makes them feel uncomfortable. They'll just pass by the display.

The answer should always be...
"Children won't spontaneously get ideas from a book just from walking by a display.
They will only get ideas from actually picking up a book and reading it cover to cover - and even then, they still only will pick a book up if the subject and writing interests them, no matter the hype is or what the cover looks like."

Just like I pass by several non-fiction sections, and in the fiction sections, the True Crime, gore porn horror, and "serious relationship" fiction - though I do like to giggle at the bodice ripper section, especially the historical "novels".