The workers at an Amazon warehouse on Staten Island New York voted for collective bargaining representation with the Amazon Labor Union (ALU) in an election held in March 2022. The NLRB issued a certification of the union's exclusive representative status for all warehouse employees at the Staten Island facility.

The ALU strikers want to carry picket signs while patrolling outside the entrances to the plant premises. You are their lawyer. The union has made two sets of picket signs. One set says, "AMAZON UNFAIR, REFUSES TO BARGAIN ABOUT EMPLOYEE MONITORING SYSTEM." The other set of signs says, "AMAZON UNFAIR, PAYS LOW WAGES." You must advise the picketers. Which signs should they carry, and which signs should they throw in the trash can? Explain your answer.