I just want to say that my arguments are only to point out that it is much more than a misdemeanor. I do agree with aries’ critique of how easily boys are sometimes expelled. I once heard B’sheim the Chazon Ish that kicking out a boy is Dinei Nefashos and needs a Bes Din of 23. There was one instance where he allowed for them to kick out a boy, but only on the condition that the Rosh Yeshiva learn with him every day.
