Snuff:
I think we need to define the meaning. Generally, I define snuff as killing of an individual while committing an erotic or sexual act. As I understand it, snuff films are exactly that.
On the other hand, I do not consider murder to be snuff. I consider it to be, simply, murder; the taking of a human life. In this regard, most mainstream hollywood films that include murder are not snuff films. Likewise, stories depicting murder or death while not engaging in an erotic or sexual act are not to be placed in the snuff genre.
The trick is in defining what we are talking about. Is snuff considered, by most of us, to be killing another person while engaging in a sexual or erotic act or is it any taking of a human life?
personally, I won't read most stories that depict my definition of snuff. I find snuff to be unerotic and quite distasteful. But I will support anyone who wishes to write or read them.
Oh, let's get off the notion that we aren't judging others or their penchant for writing or reading snuff stories. We are judging. We make judgements in everything we do. We have friends and enemies, people we like or dislike. That is judging. Frankly, I wouldn't trust someone who did not judge people or their likes. It is the condemnation of expression we need to avoid. Even, and especially, if said expression is foul to us.