"Investors should know that if Starbucks continues to stonewall and fight with union baristas, they aren’t afraid to do what it takes to win the fair contract that they’ve earned," Fox writes. "This includes going on strike if they must."

The president of Workers United writes that Starbucks is endangering its own employees and appears to even endorse a boycott of its own stores. “I am afraid,” said one worker. “My mom doesn’t want me to go to work.”