About a month ago, a group of Harvard Law School students launched the social media hashtag #DumpKirkland, targeting Kirkland & Ellis LLP — the world’s highest-grossing law firm — to compel the Chicago-headquartered firm to end its use of mandatory arbitration. The Harvard students encouraged their peers not to interview with Kirkland recruiters on campus until the firm changed its policy. On Dec. 6, Kirkland announced it ended mandatory arbitration for all employees, not just associates and summer associates.Now law …