Mailing lists! Email addresses would be easiest, but physical addresses could also be an option. For email, there could be an Intro to BNWO mailing list that believers could anonymously submit email addresses of people they'd like to be introduced, be it their partners, friends, fam, colleagues, crushes, bullies, etc. The list would not have one of those opt in confirmation emails. They would just begin receiving intriguing SFW emails with brief explainers, intriguing images, thought provoking ideas, and fun quality content that will entice the recipient to learn more, continue reading, and hopefully click links to follow their curiosity. The links could lead to deeper concepts, NSFW content, forums, wikis, memes, articles, personals, event listings, etc. Good way to selectively plant the seed and let it grow organically!