The article about the discharge of Gerri Cannon for a Facebook posting overemphasized her alleged, but non-existent, legal rights and underemphasized the actual rights of her former employer, MTC Federal Credit Union.

MTC lawfully discharged Ms. Cannon. Like almost all non-unionized employees, except senior executives with employment contracts, she was presumably employed on an "at-will" basis, which means that her employer could have discharged her for any reason except an illegal reason. Discharging Ms. Cannon for her ill-advised Facebook posting was not an illegal reason. 

Ms. Cannon's constitutional rights under the First Amendment are irrelevant. MTC is a private sector employer, and the constitution only deals with what the government, not private sector employers, can or cannot do with respect to individuals.