Found this interesting list on a website devoted to recovery from substance abuse. They're talking here about Alcoholics Anonymous. Not the organization as a whole, but individual groups where someone emerges with a narrow view of what constitutes "true recovery" and... well... just read the list.
Cult Watch 10 Points to look out for in your group members
Obsession about group or the leader putting it above most other considerations.
Member?s individual identity becomes increasingly fused with the group, the leader and/or God followed by the group.Cloning of the group members or leader?s personal behaviors.
Emotional overreaction when the group or leader is criticized. Seen as evil persecution.
Belief that the group is "THE WAY" and they have a mission
Increasing dependency upon the group or leader for problem solving, explanations, definitions and analysis, and corresponding decline in real, independent thought.
Excessive hyperactivity and work for the group or leader, at the expense of private or family interests. Drifting away from family and old friends
Preparedness to blindly follow the group or leader and defend actions or statements without seeking independent verification.
Demonization of former members or members of alternative groups.
Desire to be praised for doing the right thing and fear of public rebuke
Unhealthy wish to be seen with or aligned publicly with the leader(s) of the group
Cult Leaders 5 Points to look out for in your group leader
Authoritarian approach and intolerance of questioning or criticism. Lies about and insults opponents.
Leader shows anxiety about the world, speaking of threats or conspiracies against the group.
Leader regularly accuses dissatisfied members who leave of having something wrong with them, having personality disorders or being transgressor and deserters.
Ex-members have similar stories of abuse and ill-treatment by the leader(s).
The group/leader is always right and followers never feel they can be "good enough" .