“You have the right to act with co-workers to address work-related issues in many ways. Examples include: talking with one or more co-workers about your wages and benefits or other working conditions, circulating a petition asking for better hours, participating in a concerted refusal to work in unsafe conditions, openly talking about your pay and benefits, and joining with co-workers to talk directly to your employer, to a government agency, or to the media about problems in your workplace. Your employer cannot discharge, discipline, or threaten you for, or coercively question you about, this “protected concerted” activity. A single employee may also engage in protected concerted activity if he or she is acting on the authority of other employees, bringing group complaints to the employer's attention, trying to induce group action, or seeking to prepare for group action. However, you can lose protection by saying or doing something egregiously offensive or knowingly and maliciously false, or by publicly disparaging your employer's products or services without relating your complaints to any labor controversy.” – https://www.nlrb.gov/about-nlrb/rights-we-protect/the-law/employees/concerted-activity