Following the poorly-attended protest to get Chen to leave EXO, the next step was putting a billboard truck in front of SM COEX Artium to call for his removal. Intended to stay up for the rest of the month, people amusingly noticed that the truck was parked illegally and reported the violation.
This led to it being removed prematurely, with the plans seemingly being abandoned.
For me, it’s canon that it got sadly dragged away by a tow truck.
Regardless, their campaign … uh, doesn’t seem to be going well.