The Shroom Shade was a terrorist group that sprouted up sometime around XX580. They formed as a couple of dissenting off-world gangs joined together under the common desire for legal respect. They used all means possible to cause chaos in the streets. Their crimes became exponentially more dangerous and lucrative.
Vandalism, to written threats towards nobles, to destroying Lawmen, to arson and robbery, kidnapping people off the streets to hold for random, torturing captives in horrid psychological ways with zero intention to release them, to shooting up the Ahsonov Ball.
There was a loose caste system inside the Shroom Shade, those who committed more heinous crimes being regarded as throwing their lives on the line for all of Stem City's off-worlders, and thus seen as heroes amongst the rebellion.
After a group of agents shot up the Ahsonov Ball in XX698, the ABANDON ACT was passed. This didn't satisfy the bloodlust of the violent, as the nobles fought back against Stem Tower's decision. The SURVIVE ACT a decade later did little to stiffen the still-growing group.
Stem Tower snapped. They passed the SAFETY ACT which slowly broke down the Shroom Shade from the inside out. Off-worlders began reporting Shroom Shade members in order to get a cut of the massive Mark reward the city was offering.
A majority of the Shroom Shade, around 300 members, were snitched on, arrested, and held in The Complex. The small remaining loyalist holdouts quietly fizzled out due to the fear that the lower class that they fought for would turn them in. In XX665, the last Shroom Shade member lost his motivation.