Very shady. Move to a place where those terms are unenforceable. I think its less about Amazon being scared and more of a tool to suppress wage growth.
A "Proprietary Information and Assignment Agreement" is about protecting proprietary information. It is illegal in all 50 states to use trade-secret information at a new employer. See Anthony Levandowski.
A Non-compete is about labor market, wage, and competition suppression.
"In the past, it was commonly believed that out of state non-compete agreements may be unenforceable if the employee is first to file an action in a California court asking that the court declare the non-compete agreement unenforceable."
"Thus the employees [...] argued that the enforcement of the [Washington non-compete agreement] would violate California’s policy of not enforcing non-compete clauses. The California court disagreed [and upheld the non-compete"
http://www.carr-mcclellan.com/insights/why-assuming-out-of-s...