I've started a Facebook group:
Something of an experiment, but not everyone likes forums, and it might help reach some different people.
Tales From the Rabbit Hole is a group for discussing the issues raised in the podcast of the same, and the associated book Escaping the Rabbit Hole.
How to people get sucked into the conspiracy theory rabbit hole? What happens there? How do they get out? How can we help?
All are welcome, but please keep it polite and respectful. Don't call anyone crazy or stupid.