About the "refuse" part, the first thing is to work with the mods not against them. If they didn't realise there were NTR content, you could tell them which choices led to those scenes and describe why you think those scenes were NTR. Then you give them time to review the game and add the tag. There are so many games on the site and mods don't magically knows all the content right away.
As for the "predict" part, we cant. Its unfortunate but I don't think its anyone's fault. Good thing is this doesn't happen often.
Back to this game, I remember there used to be non con scenes (with warning). I think those should be considered NTR but its was a long time ago I could be wrong, or maybe the dev removed those scenes? I'm not going to replay the whole thing again until season 1 full release.