The world is going to be a nuclear wasteland long before this ever finishes. Hearts out to Miura for keeping this going through all his problems I believe he was having. I've gotten used to to unfinished/axed manga, so it's pretty well a nonissue at this point
I don't condone these actions, but you shouldn't be surprised that you get fucked over after doing it to someone else. There is next to zero responsibility taken for a majority of the characters in this manga
Would that fall under attempted murder? I know it's a manga and fits whatever narrative the author wants, but skipping school for months at a time just to come back like nothing happened is silly after all the times the other teachers have complained about their "image" when Onizuka is involved...