One danger of a positive feedback loop is that "if too many new jobs are allowed to enter the job stream, the result can be an increase in page faults." However, a positive feedback loop can still function as an "amplifier" which could change the equilibrium state of a system into unstable.
1. Dorothea Schlosser was able to live a relatively normal life despite her jewish heritage because she had the Aryan documents that is from her father that gave her the privilege to live normally. In doing this, the part of her having a jewish heritage is being disregarded because of the documents that she takes a hold of.
Flow most likely arises when one's activity entails a balanced ratio of A) skills to challenges, I believe.