Aunor says that the Drifter has been flooding the Crucible with his followers. She's worried that Drifter's fake-Dredgens will collide with genuine Dredgens, and someone might get legitimately killed. But your reputation precedes you. If you're there as a lifeguard, people will likely behave.
Defeat Guardians in the Crucible.
Legendary Quest Step
2019.03.05 (Season of the Drifter)