How to Organize Pub Hubs in Public Spaces

Pub hubs is built around this identity architecture called Irma with bar yachubs has worked on it's a very clever system that lets you present a credential. We want 12th graders to be able to have a discussion about LGBTQ issues in books and we want to make sure that people are actually 12th grade rather than predatory adults but we also want to be anonymous. The idea of something like a Facebook group as being the reason why we might have pub hubs instead of going into that closed monetized environment perhaps my high school provides this space instead.