I maintained in another thread that art either can or cannot be allowed to offend. My thinking here is that trying to choose art which should be allowed to (or even encouraged to) and choosing art which should not be allowed to is as flawed as trying to select "good" or "appropriate" art for funding.
I think that either we accept that art might offend us (and that being offended is never fatal) or we really need to consider that if anyone has a right to not be offended then we all do... which would pretty much reduce art to pretty pictures of sunsets.
Until someone is offended by those too.