That is a fine example of life coming at you fast. Up until 1917 it is an inspiring anti-capitalist poster. Then history in Russia speeds up. 1921 brings the Kronstadt Rebellion. People are noticing what revolutions really do: meet the new boss, same as the old boss. Well, not exactly the same, but the middle layer "We shoot at you" never changes, and the post gains a new and ironic layer of meaning.