a problem that can happen is that author makes the mc way too overpowered and the villians need to be stupid powerful for there to be any kind of struggle because "haha big number on mc's status screen more important than good story:huh:"
I mean that system makes the most sense and is simple to enforce/proof something is an erotica or not but it seems like some people think the threshold for the pornographic tag is way lower than it actually is.
i feel like the line between pornographic and erotica is a bit blurry so its hard to say how much exactly is too much but compared to some other "erotica" it still seems mostly okay