Note that this is being proposed as something states should do. Federal legislation is not being proposed. Worst case would be Federal legislation which was weak and pre-empted state legislation, weakening California's ban. California employment law prohibits non-compete agreements for employees, and has since 1872. California also prohibits any employee agreement which claims employer ownership of intellectual prope…
I have always wondered how could such a claim on ownership could exist in the first place. This reduces the employee to a mere company slave.