Sometimes the best comedy is in questionable taste. As far as I’m concerned, when you went out of your way to hear it and can feel to walk out on it, when you realize that you’re in a medium where the performer can tell some slice of the truth with such hyperbole that the justice or injustice of it can get lost without anyone truly being misled, that’s OK…that is, if it is kept within the boundaries where slander laws don’t apply.
I think a stage is like the flip side of a court of law. In court, strict justice gets so much preference that the truth might be obscured. In comedy, the truth gets its day and strict justice takes the back seat. (And sometimes, comedy comes into the courtroom for just the same reasons that law invades the stage…someone is going over a line!)
I believe in the boundaries of polite behavior, but IMHO there is a real danger in extending those boundaries to all times and all situations. When that has happened in the past, I think a certain falseness inevitably crept in, not to mention a suffocating pretentiousness. Comedians, poets, playwrights, and writers of fiction are a guard against that: they are the enemies of the false and the pretentious. For instance, George Carlin was totally inappropriate for “polite” company, but he put the spotlight on the dangers of euphemism. He didn’t just make people laugh. He reminded them to have a healthy wariness for “pretty talk”. That is a very good thing.
Of course, the other thing that comedy does is hold up a mirror so honest that you have to either laugh or throw something. That’s not such a bad thing for the human race to learn to love, either! As St. Thomas reportedly said, “The devil is a proude spirit, and cannot endure to be mocked.” All pride is like that, and humor is a good weapon against it.