Study each of the following case carefully. Briefly state the principle of law and your decision.

An employee posted on her personal Facebook page that her manager “does not feel that we help customers enough—I’ve had it. My fellow coworkers—How do U feel?” Other coworkers responded on Facebook, indicating that they were also frustrated by the lack of appreciation for their efforts at the workplace. The supervisor in question attempts to discipline all workers posting on Facebook about the workplace environment. Is the supervisor able to use these social media conversations as a basis for discipline?