People into weirder stuff like snuff have usually went so far into the deep end they already know their interests are weird to other people, and happily accept that. I think it's why they tend to be so careful with censoring/thumbnails and tagging, as well as just sticking to the same artists over and over.
It's the ones who try to defend it to the death about it needing being normalized that are usually a warning sign. Fatfurs trying to pose under the guise of body positivity while fetishizing things like the writing someone posted here involving heart failure and such - Those scare me more than snuff does. It's so much more common to meet weird creeper feeder folk looking for a partner to enable disorderly eating within.
Anyway!