A Chipotle shareholder is suing the company, claiming they faced "significant losses" due to the alleged portion-size reductions that caused a frenzy over social media.  On Monday, a proposed class-action lawsuit was filed on behalf of Micheal Stradford, who claimed that the company had "understated how difficult it would be to compete" within the highly competitive industry as it "provided customers with highly inconsistent (and in the view of some customers, lacking) portion sizes." "If guests do not agre ...