Excellent bit of guerrilla agitprop.

Agitprop, from Russian: агитпроп [ɐɡʲɪtˈprop]) is derived from agitation and propaganda. The term originated in Soviet Russia (the future USSR), where the term was a shortened form of отдел агитации и пропаганды (otdel agitatsii i propagandy), i.e., Department for Agitation and Propaganda, which was part of the Central and regional committees of the Communist Party of the Soviet Union. The department was later renamed Ideological Department.

The term propaganda in the Russian language did not bear any negative connotation at the time. It simply meant "dissemination of ideas". In the case of agitprop, the ideas to be disseminated were those of communism, including explanations of the policy of the Communist Party and the Soviet state. In other contexts, propaganda could mean dissemination of any kind of beneficial knowledge, e.g., of new methods in agriculture. Agitation meant urging people to do what Soviet leaders expected them to do; again, at various levels. In other words, propaganda was supposed to act on the mind, while agitation acted on emotions, although both usually went together, thus giving rise to the cliché "propaganda and agitation". -- Wikipedia.

Hacked DOT Road Sign Reads "Impeach Obama"