media, media, media.....

From what i understand from these three terms, obscenity has always been illegal because it is concerned with the harmful effect of the article on its reader or audience. This is because anything that is completely lack of scientific, political, educational or social value is said to be obscene.

Pornography, is a sexually explicit pictures, writing or other material whose primary purpose is to cause sexual arousal.

Whereas indecency need not be said as pornography because indecency can most easily be described as what makes a PG-rated movie PG instead of G.

Besides that, the works of obscenity, pornography and indecency are controlled and monitored by tight rules of certain countries, by people who are paid by the government to get the job done.

Heres a video of an anti-pornography activist.