So to my answer my question the last chapter the teachers really did hear all that and almost punished one of the victims. Honestly what the hell? Like I realize this manga is ridiculous but wowza
The raws are up to chapter 130+ so no, Axe-kun isn't even in the house.
The novel ended 3 years ago with 13 vols, so it had a quite successful run, dunno how far are we from the ending in the manga, because even if the latest raws do feel like it's headed towards it, with this story you never know.