Culture Jamming

According to urbandictionary.com "Culture jamming, is the act of using existing media such as billboards, bus-ads, posters, and other ads to comment on those very media themselves or on society in general, using the original medium's communication method. It is based on the idea that advertising is little more than propaganda for established interests, and that there is little escape from this propaganda in industrialized nations. Culture jamming differs from artistic appropriation (which is done for art's sake), and from vandalism where destruction or defacement is the primary goal." Let's take a moment to think where we have seen this recently.