Totally agree with the self-censorship, it was kind of my point. Nobody likes to deal with a bunch of aggressive people complaining about a certain topic you can 'easily' avoid by just not adding any other straight male character.
There is already a 'cheating' tag, and also a 'sharing' one for those games in which the MC's partner has sex with other people with the MC's acknowledgment (or even encouragement) and without creating jealousy in him. And since this is a controversial topic that forces mods to intervene quite often in those game's threads, these tags are usually well placed, according to their definition in site's rules. But in those threads you'll find the vocal group asking for the NTR tag to be added either way, plus people genuinely asking for details on the exact nature of the content tagged, since those tags are still a bit broad (like, is the MC cheating or being cheated?), which can be tiresome and annoying, and leads us to the first point: why bother dealing with this when you can just create a safe world for these people.
There is actually no sharing tag, which is annoying. There is a swinging tag, which is too narrow to encompass other forms of sharing. I keep saying that we need a blanket, "non-MC sex" tag to cover all the situations where NTR is being misused.
Jumping into this discussion, I'd like to offer some viewpoints as an avid NTR enjoyer. The discussion is mostly on the right track. There is a vast difference between actual NTR and what sparks the usual dogpiling in "NTR games that are not tagged as such."
NTR means "to be stolen by sleeping with," or something along those lines. That stolen part is very important and a core aspect of NTR that isn't necessarily found in standard cheating. Jealousy and all that shit is just a secondary effect and not the core criteria. That said, negative emotions, not necessarily limited to jealousy is very often present. Without getting to deep, what does this mean as a tag?
NTR is not an act, it is a theme. A deliberate theme created with intent by the dev or writer. Some girl banging a non-MC dude can be a huge number of different things, but it's really fucking hard to create NTR accidentally, and it certainly doesn't hinge on some player feeling jealous on behalf of the MC.
To get into it a bit more, how is this theme of NTR constructed? In the vast majority of cases, it follows the standard progression.
1. Initial peaceful state of the male and female protagonists.
2. Introduction of the antagonist.
3. Corruption arc of the female by the antagonist dick.
4. NTR reveal and fallen heroine (mind broken, cock addicted, whored, etc.).
Throughout this progression, the female loses her close bond with the male protagonist and is thus
stolen. This bond doesn't even have to be a romantic one. It just has to be a close bond, but a bond has to be there for it to be broken.
So yea, NTR is pretty specific right? It takes deliberate intent to make NTR. There are some overlap with the western styled cuckolding and the broader cheating situations, but NTR is quite a bit more demanding in the story "real estate" if that makes sense.
That said, I don't even really mind if cheating and western cuckolding is just lumped with NTR at this point. What truly gets on my nerves, and what most of you are essentially lamenting, is the NTR hysteria basically gatekeeping writers from exploring things that are not even cheating or cuckolding. Things like MC's best friend having a girl. Things like parents having sex. Just people having some agency on their own outside of the MC, a lot of times without even any hint of maliciousness. It greatly limits the type of stories we might have. They all end up at one extreme or the other. Another safe space harem romance, or a flat out NTR game. The vast space in between, where some mature, nuanced, and realistic character interactions could happen is just a hellscape for devs.