Should there be limits on art?

I think yes and the audience, viewers, spectators are the ones responsible for applying them. In light of the release of the movie Bruno by Sacha Baron Cohen, there will be many discussions on where art stops serving as a means of entertainment and becomes a means for provocation. In my opinion the answer is to be given by those who pay to watch it(as well as those who refrain from doing so). I am personally not very interested in listening to "experts'" opinions.

Art of course is not solely a means of entertainment. Aristotle considered tragedy to have unique qualities with its roots in the cause and effect nature of the universe. He also suggested that fear and pity should be invoked within the audience. Plato on the other hand disregarded any form of art.