I think the real problem is the assignment of these labels are fairly arbitrary. I could write any thing, then publish it as YA, or OF (old fart). Most book sellers will honor the label put on it by the publisher so it ends up on the shelf with the YA/OF books regardless of the content. Sure go way out of like (like pass off erotica as children's lit) and you will have book sellers relabel you ... but if your sorta kind of close, then the label seems to just stick.
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