Five main things that make destructive cult groups dangerous to their followers...

Essentially there are five main things that make destructive cult groups dangerous to their followers:

Here's one: These groups make the cost of leaving extremely high. It is associated with persecution, isolation, and/or failure; much more than just wasted time and effort on the part of the member. It will be the end; you will be isolated, cast into hell, a complete outcast, etc. It is always made to sound as if leaving is never an option.

Can you name any others?