Hate preachers should be forced into the shadows, an anti-terrorism commander has told an inquiry, despite suggestions they were better in the open. Advertisement AdvertisementAdvertisement AdvertisementIslamist extremism expert Rodger Shanahan previously told the commission he feared a further crackdown would make criminal preachers harder to catch. The police commander told the commission he respectfully disagreed. (Dean Lewins/AAP PHOTOS)Gendered content on social media, online dating and pornography had a negative relationship with gender attitudes. "(It) might actually prove effective as national security in countering violent extremism and primary prevention, as well as addressing their gender attitudes," she said.