chubbyhoney made a great post above. The true answer is that the site isn't one or the other, but a hybrid. Once upon a time it was fetish-focused, but came to greatly incorporate general fat positivity as well.
There are many fetish aspects to the site, yes. It caters to feeders, feedees, mutual gainers/etc, and it doesn't just stop there, it also includes things like humiliation, squashing, pregnancy, immobility, inflation with air/water/etc, and more. As such it inevitably attracts those who come here specifically for sexual reasons and who don't care about the community aspect, which unfortunately tends to come paired with the ignorant attitudes that people have complained about in this topic.
But does that mean it should be tolerated? Nope. Just because they lurch in the door like zombies (with about the same charisma) for their sexual fix doesn't mean people can't vent about them, and it doesn't mean that they can't be shot-gunned like the undead that they mimic once they start harassing people.
The upcoming block feature will help with this, but also if anyone doesn't want someone to contact them any more, they can report them by clicking the red flag on their profile. They don't even need to give a reason other than "I don't want them to talk to me any more". And if someone is found to be breaching the 'restraining order', they will be (and are) punished, simple as that. If someone can't respect another person's boundaries, then we don't want that person on the site.
Some of the offenders have ranted back about their punishment, but if they can't act like a decent human being and respect a person saying "no", that's their problem. Despite them treating people on here like pieces of meat, this is not Burger King, they can't have it their way.
10 years