I don't get it. They are complaining that their routine is stifling. Okay, fine. Change your routine.
Unfortunately, their idea of changing their routine calls for them to gather in groups, threaten law-abiding citizens, vandalize businesses and others' property, and confront police officers.
I understand why they might not find stamp-collecting would give them a satisfactory kick and break from their stifling routine, but they could try mountain climbing, skydiving, motorcycle racing, etc. Yet, even those would not satisfy their need to destroy.