The Federal Rules Advisory Committee is considering a new rule of civil procedure to govern multidistrict litigation (MDLs), and recent rulings in an herbicide MDL are spotlighting a key issue before the committee: the urgent need to address the widespread filing of unsupported claims. These are claims where people responded to lawsuit advertisements, but never provided evidence to anyone that they used the product or sustained the injury at issue in the litigation. Their mass presence is undermining many MDLs.