On the other hand, every time this topic comes up here or elsewhere, the majority of stories are positive, with a few horror stories (fewer than I'd expect for

On the other hand, every time this topic comes up here or elsewhere, the majority of stories are positive, with a few horror stories (fewer than I'd expect for such an intense experience). 'Survivorship bias' is a misleading term for what you intend to imply, because those who have had a bad LSD experience are no less capable of sharing their intense experience except in the most extreme cases (i.e. when they didn't, in fact, survive). Personally, if I had such an intensely bad experience I'd be quite willing to share it so that others can avoid it. That is just not reflected the balance of stories I read though.