well, it depends whether it is used to intentionally mislead the public. not all propoganda is wrong. the word "propoganda" gets a bad rap because people think of how the nazis used propoganda in WWII, which was to intentionally mislead, and was just basically sick and twisted.
but all advertisers and public relations people use propoganda. it is basically "propogating" an idea, or promoting it. Its not really a "right" or "wrong" issue, but more in the right and wrong ways to use propoganda. because there are definitely wrong ways.