She needs to go visit Melonbooks in Japan if she wants to see far less tame stuff.
I came across one with sadistic brutal themes and my mind went "I'm not surprised this exists. I AM surprised this exists in paperback." and I had to buy it just for the novelty of it.
Although at the end of the day it's a matter of how deep pocketbooks are. Buy Visa/Mastercard stock (Not sure of their ticker) and have a good share percentage, threaten that they can't do crap like this, and you'll find they reverse their decision REAL quick when the CEO's pocketbooks are impacted.