Responses

2nd gen idols well aware of that [idk about the 3rd to current ones] they even often read it and giving their own reviews directly. tvxq and super junior for example, those people even bought the physical book of their fics (back then, digital and internet wasnt as massive as nowadays) including the mpreg ones and talk about it in their show
no cuz does that mean the k-idols knows that some of their fans wrote a fanfic about them? doesn't that feel awkward with his co-members