Fucking no strike clause, what the FUCK
Liberals are fucking moronic scum, we have no freedom, we have no rights, we are granted no provisions for our betterment or even protection or basic decision making
I will destroy this evil land, I will spill the blood of oppressors and free my fellow workers from their chains
I AM RISEN 
There's probably other concerted activity you can engage in beyond the grievance process. Organized sick outs, harassment of managers, slow downs, etc. Hell even if the strike would technically be illegal they can't force you to work.