poster hack

Here in DC, creative individuals appear to have revised Chevron ads in at least one Metro station to reflect a more, er, politically overt sentiment. The poster hack changes the promise "I will use less energy" in this ad (pdf) to "I will stop lobbying against climate legislation." The digitally executed revision (which looks pretty convincing in person) follows in the footsteps of Berlin graffiti artists and others who use graphic hacks to subtly shift, reverse, or critique advertising in public places. The question is, how many people have noticed? (Keep your eyes open, DC residents!)