There was a time when John Waters was a lone wolf with his satirical and offensive scripts that skewered middle-class values. But today, he is just one of many filmmakers trying to out-crass and out-skewer one another. What made him a cult figure was his ability to shock the audience. In his “Pink Flamingos,” he showed a person eating dog excrement. But Waters ceases to shock with his nauseating look at life. Like so many other comic filmmakers of today, his pictures merely attract those who crave humor from bodily functions.