Propaganda, A Parasite On Society? Or A Leach To Our Infection?

In our lives, we have all been exposed to many, many types and variations of propaganda.  You can date propaganda back hundreds of years.  Before, the use of propaganda was to promote authority such as the church or to promote nationalism and trust in your government during times of war (i.e. World War 1).  Though, the times have changed.  Propaganda has now become a very negative, hostile world in the eyes of today's citizens.  It has come off now as a "parasite attached to society."  What I mean by this is that propaganda is animated as a parasite that lives off of society, only to use, take, and thrive off of its host (society) without giving anything in return.  The most common use of propaganda is to try to appeal to the weakest human emotion, fear.  Propaganda only works if it can appeal to the thought process of a being observing it.  Most propaganda that attempts to install fear to those it is targeting use the rhetoric appeal of pathos, appealing to human emotion.  The propaganda usually depicts gruesome images to put the audience it targets in a sense of paranoia.  Though, there is propaganda that is suppose to be positive and tries to promote hope for its audience.  Yet, they many times draw the ideas.  For example, a proactive ad suggesting that you have to use this product to remove your acne imperfections, implying that you have to have perfect skin.  In reality, this is not a positive image being promoted.  This is why overall propaganda has evolved into an evil beast to say the least.