SHIT is defined as a contemptible or a worthless person.
It is up to our individual interpretation to determine what shit can represent. Pictures made of different kinds of shit present a valid way of defining and expressing human disgust from mis-treatment, torment & hate. People like Hitler, Pol Pot, Stalen, Mao Zedong, Trotsky, Lenin, dictators, terrorists, sadistic politicians, in-human murders, sexual predators, and the torment of war and human struggle can be represented by a shit picture.