A company prohibits any employee from making disparaging comments about the company through any social media, including online blogs, email, and other electronic media. Violation of this rule is...

A company prohibits any employee from making disparaging comments about the company through any social media, including online blogs, email, and other electronic media. Violation of this rule is grounds for dismissal. Explain whether this rule is ethical. If not, how should it be revised? Explain.