Perhaps a community of survivors and or allies has dialogue and insight they want to share publicly. "I wish the public were more aware about x". Dispelling common myths for example. Sharing public information from outside sources.

For example, I heard Darun Khalel's story (trigger warning) It was a powerful example of how even someone who did all the right things before during and after has to fight a system stacked against them. I came home and told my wife and daughter about this immediately and had another discussion about safety, trusting your instincts and what to do.

Edit: also the public forum could serve as a proving ground for vetting allies before inviting them to the next tier.