The NVA publishes Pernicious Literature, a pamphlet aimed at the banning of Émile Zola's writings in the U.K. It was written “in the strong hope that it may sound as a note of alarm, and rouse the manhood of England to action in relation to the growth of this evil, which is to-day a menace to our religious, social and national life.” It asserts that the legislature should serve as the arbiter of what’s deemed moral or immoral in place of “lax public opinion”, and the association even offered to take financial responsibility for cases in which there was sufficient evidence of such pernicious activity.

Sources: http://www.artandpopularculture.com/Pernicious_Literature

https://babel.hathitrust.org/cgi/pt?id=njp.32101050607215&view=1up&seq=5