If snuff is to be incorporated in fiction here, or anywhere else for that matter, clear disclaimers should preface each story to avoid such misunderstanding by the too gullible.
I don’t’ believe I’m ‘too gullible’ I just don’t happen to enjoy these kinds of stories, for the reasons I've already given. Damn it, of course I understand the difference between fact and fiction, and I’m confident all but a few do.

The writer can then produce whatever for mature consumption, knowing well that neither he nor she, nor the reader, intend on actually believing what is never meant to actually see the light of day.
Yes, and I think a truly talented writer of fiction is able to suspend a reader’s believe of reality for a time. Its like when I read a well written story with a sad ending, I might have little cry, but it doesn’t mean I think what ever it was that set me off really occurred. Crazy isn't it? I kind of 'enjoy' a good sad story every so often.

I guess anything to do with human thinking and/or behavior is always going to be a very complex issue. The bottom line is everyone is different, and really would we want it any other way?