As if you needed more to deal with from the National Labor Relations Board, be sure that your social media policy is compliant with NLRB standards. Ragan offers this useful article, stating what you should keep in mind and how the NLRB has targeted one wholesale giant.
Here’s the deal. If a work rule has the potential to reasonably chill an employee’s right to organize or bargain collectively, it’s unlawful. Employees have the right to complain publicly if they think their employers’ labor practices are unfair.
So if I complain on Linkedin that someone else is making more than I do, and it’s unfair, that’s a protected activity. If you fire me for disclosing confidential salary information, you’re going to lose in court. It’s as simple as that, and if your social media policy prohibits it, you are opening your company up to a NLRB action.
Your social media policy cannot limit free speech
You don’t have to reference the National Labor Relations Act to violate it. If your social media policy uses language that restricts employees from using social media to "damage the Company, defame any individual or damage any person’s reputation" the NLRB sees it as restricting labor’s protected rights, because that social media policy it could have a chilling effect on what is seen a free-speech issue.
On the other hand, if the restrictions are subordinated to a clause on sexual misconduct or racial harassment, it would be allowed, as employees would be able to appreciate the rule in context. It’s the overly broad restrictions (often wrapped into social media policy) that the NLRB opposes. The best social media policies will be more exacting in their language.