No employer, or any of its agents, may discharge or cause to be discharged or in any other manner discriminate against or take or threaten any adverse action, including changes in working assignments or conditions, any employee because the employee—
(1)
disseminated any message on the employer's property or elsewhere, including through images, handbilling, picketing, work stoppages, or gathering in groups to protest conflicts with employers or to help persuade employers to change working conditions, provided the employees do not have a representative for the purpose of collective bargaining and the employee's actions—
(A)
were not taken during work time, except during a lawful work stoppage;
(C)
did not destroy or damage property of the employer or block entrances or exits of the employer or otherwise impede the operations of the employer or the work of other employees; or
(2)
planned any of the actions described in paragraph (1), or assisted, encouraged, or supported another employee in engaging in any such actions.