I found a link to adbusters site. Adbusters is a global network of artists, activists, writers, etc.. who want to advance the new social activist movement of the information age. Their ads are censored from biggest channels in US like MTV, CNN, Fox, NBC ABC etc…
Here is a few picks from their website.

» Is REALLY nicotine addictive let’s see what corporate leaders say under oath?

» WTO in Seattle 1999 nice video