webaganda 

Propaganda spread specifically via the internet, especially using low resolution images of a political nature often incorporating photo-montage.

(The term first popularized by a psychological warfare expert in 2005)

The distribution of mocking retouched photographs of US President George Bush portraying him as a buffoon or to ridicule US foreign policy, distributed via chain emails and posted on political internet forums, is an example of webaganda.

webaganda by Psywarrior January 1, 2009