System controls internet, phone network, electricity, food and oil delivery.
IF you want to stop a revolution in 21st century just shutdown everything and blockade roads. How long till people start dying? A week?
What are the rebels gonna do? Assauls tanks and machine guns? Or starve/freeze/cook to death without electricity/oil/food?
The American delusion of aremd citizens defending constitution is just that - a delusion. In real life army mops the floor with small minority of suicidal rebels, and the rest begrudgingly return to their usual jobs because it's much better than starving and fearing for life every day.