Earlier quoted context omitted.
Ah yes, the "art terrorist". Someone who has spent too much time sniffing paint cans and not enough time studying history.
Communication (and media) is important during a revolution (Examples: [1]). Or, more recently, look at the Arab spring where GSM and Bluetooth were important. The importance of radio and TV. Art is a form of communication, and with proper coverage the message is spread (ie. Bansky). [1] https://en.wikipedia.org/wiki/Revolutions_of_1989
Art != Communication
And art is not a form of communication ether.
There is no shortage of literature on this topic but good place to start is Aristotle’s Poetics, essentially the first art theory ever written and it dives head first into the issue. In it, Aristotle laments on the corruption of communication at the hands of poetry.