In [AT&T Mobility v.] Concepcion, the court vastly expanded the reach of arbitration by ruling that corporations could block the consumers they force into arbitration from pursuing cases as a class.
Since Concepcion, judges have cited the case in decisions that stopped at least 76 potential class-action lawsuits from going forward. Several judges have expressed frustration that the decision has forced them to stop consumer actions that are best suited to proceed as class actions. Class-action lawsuits historically have provided a means to combat illegal payday lending practices, contest poor business practices and confront discriminatory auto lending. But Concepcion has left many consumers without a means to pursue redress
(emphasis added - PerSe1010)