I voted "Yes" because of a freedom issue involved. I also like my own freedom not to have gore in my house, it sort of works both ways, I think.
It's art. Why would an artist paint a picture with a certain subject matter?
Maybe because he's compelled to, or maybe he's trying to make the rent and he ends up doing something a benefactor is willing to pay him for, like a picture of the benefactor's homely , obnoxious child painted looking totally angelic?
Both could be considerd "ART" by alot of people, but then art is highly personal and subjective.
When there is only "Benefactor" inspired "art" freedom is lost, the best , most memorable expressions of the human striving for self-expression do not usually invole someone else making suggestions or "pulling Strings".
If the design and subject matter of a haunted house is unpopular, ticket sales will show it.
People should be as free as they can be to pursue their own visions of the way things should be. Just don't try it on somebody elses's money, unless they don't care if they never see any of it again?