What you suggest is illegal and unconstitutional. From wikipedia:
"As originally enacted in 1935, the NLRA, National Labor Relations Act, then also known as "the Wagner Act", makes it illegal for employers to discriminate against workers because of their union merabership or retaliate against them for engaging in organizing campaigns or other "concerted activities", to form "company unions", or to refuse to engage in collective bargaining with the union that represented their employees."
"the United States Constitution protects their rights to freedom of speech and freedom of association."
The reality of course is that companies who fire employees for attempting to form a union are subject to a token fine and usually pay it instead of following the multitude of labor laws. Businesses have also manipulated current law to make it extremely difficult for employees who are interested in a union from exercising their right to form one, usually through forcing an 'open' vote and refusing to bargain in good faith. It's surprising to me that the Cricket workers would even have tried to organize.
Before the recession started, the condition of service workers has been declining, it seems like this has only speeded up in the past two years. The lack of awareness (or just not caring about the fact) that the people who work for you are important and are also human beings who need a livable income is the reason good customer service, passable employee morale, and real job security have become a thing of the past.