Finally getting around to reading this chapter!!
It's interesting to think about how to keep predators out. Maybe there can also be some sort of structured process before people attend the GSG's. Like talk with a GSG facilitator 1:1 about your needs beforehand, and also process the guidelines together too so you know what to expect and how to contribute. Being attended to on a more intimate level could help people feel met where they are first, which could prevent them from being disrespectful. On the other hand, doing this might allow a GSG facilitator to get a good sense whether it's appropriate for the person to attend one. A database to document each person would serve as a way to keep track of who's coming, and as River said, it would be a transparent process so that people know what data is being collected and why.
Attending to everyone individually is a big deal though. But after a while, it would only be new people not in the system.
Maybe ordinary citizens can step up and take a leadership role in their local areas around this. De-escalating situations, helping out with the vetting. Hehe...
RE: A Biometric Database