Rebellion can even be found in virtual space, without ever leaving one's bedroom.
Those who play with or otherwise alter commercial space.
As long as there have been streets and crowds, there have been occasional angry mobs, waving torches and bellowing demands.
Using the principles of theater (usually comedic) to mess with the news.
From the earliest cave sketch to the latest MoMa escapade.
The Good Guide to Culture Jamming Introduction.
Sometimes "street artists" are fine artists gone wild, having fled the confines of the gallery to apply their work directly on the urban landscape.