Technically, any message designed to sway a large group to your way of thinking is propaganda. And propaganda can be used for either good or evil. Both the Nazis and the Allies used propaganda. Microsoft, Apple, and Linux all use propaganda. All advertising is propaganda. News broadcasts, even at their most impartial, are propaganda. Many Everything2 writeups are propaganda. A whole lot of the stuff you tell people, from your friends and family to your employer to the cop who stops you for speeding, is propaganda.
You can't avoid it.