The problem with such a broad definition of 'art' is that is utterly undermines talent, skill, ability, or practice.
When something as rich in poetry and metaphor as Jabberwocky, or The Raven is compared on equal terms to some shut in telling us how awful his life is through non-rhyming verse that might as well be a disjointed monologue, it undermines the detail and ability of those writers.
When something as vivid and surreal as Salvador Dali's work, or Escher's pieces are compared on equal footing as Tracey Emin messing her bed up and putting it on display, it makes their talent seem insignificant.
If anyone can create a masterpiece, then where is the pride or notoriety? Where is the recognition or respect due?
I would not say that this is art, it's an expression certainly, but I wouldn't say that makes it art in any way shape or form, I express my opinions on a daily basis, we each express how we feel through facial expression, body language, vocal tone and choice of words, none of the above are art, so why is it automatically such when it's put on paper, or, in this case, film?
I don't believe in censorship, if people want to watch this, they undoubtably will, personally I'll probably get ahold of it at the first opportunity, it sounds rather intriguing in a macabre and gruesome way, but it is nothing more than make believe, and shouldn't be granted the level of power it's being afforded by being banned.
My moral standards and ideals are mine and mine alone, they should not be the territory of faceless beauracrats, or ignorant bigots who feel themselves superior because of an idea they hold.