I know this is a difficult concept for some peoples to grasp (not the OP sorry), but a person can find something sexually arousing without the need to masturbate to it.
Besides I don't see any reason why I should care a wit what others masturbate to as long as they do it discreetly where I can't see it and they don't talk about it to me (too much). It's not a crime to masturbate in private, because it doesn't hurt anyone.
So, I guess my short answer is, I don't care, I don't worry about it, and I don't need to know.
I think peoples make too big of a deal about fetishes to be honest. Most of them are harmless. However, adult filters are nice so that people who don't want to see fetish imagery don't have to. Also, having a "fetish" interest does automatically mean a person masturbates to it. There is such a thing as enjoying being lightly aroused or excited by certain things.
Okay men love the Dallas Cowboy cheerleaders. They like to see them on tv during the big game cause they are hot and cute and it turns men on. All the men seeing the girls don't immediately begin masturbating during the NFL intermission.
People are often forgetting there is an emotional and mental component to being sexually stimulated that is not necessarily physical. I would even venture to say that most sexuality is non-physical, but rather mental-emotional and aesthetics.
Not many people are going to openly admit in your thread to masturbating to fetish imagery.