Everyone Is Jesus in Purgatory: According to Braun, you can never overanalyze NofNA. You can, however, take the analyzing to ridiculous levels! SV has been compared to religious extremists and great Greek philosophers.
An earlier version of 10%+ had very strong coarse language; this was changed to make it more approachable to a wider audience. Now, this in itself isn't bad. However, one of Polarizing's lines changed from "smashed against the fucking wall" to... "smashed against the far-flung wall". Really?
One page of Secretary has a facture which looks like it's named "pee". (It's actually "spee".)
In addition, some may find that the animals referring to themselves as humans would break suspension of disbelief.
Nightmare Fuel: Oh hell yes. There are tons of stuff that could qualify, especially in Secretary.
What an Idiot: Polarizing spends an awful lot of time talking and boasting about the things he can do to Quintet, instead of actually doing most of them. Arguably justified somewhat in that he probably doesn't want to actually kill her, going so far as to use a facture to open a hole in the previously closed off cavern and urge her to leave.