Alex, here is the kind of thing you could do in a trustworthy organization:
Go to a forum leader and ask, "Have Landmark members ever submitted a petition to change recruitment policy? If so, can I see a copy of the petition and any formal responses?"
If you are working with people of high integrity, this should be a trivial process.
If you don't think you can do this, then why
Forum: Large Group Awareness Training, "Human Potential"