R’ Yaakov Bender shlita often tells a story about his Rebbe, R’ Shmuel Berenbaum zt”l. There was a bochur in the Mir who developed a gambling problem. He ended up drawing in others in an attempt to deal with his own mounting debt.
R’ Bender, along with a few other elder bochurim, approached the Rosh Yeshiva, and told him about the situation, and they told him they felt the boy must be expelled. They weren’t prepared for the response that followed. R’ Berenbaum yelled at them, “Did you fast 40 taneisim before making such a decision?!?! How can you decide dinei nefashos without fasting for 40 days?”
R’ Berenbaum worked closely with the bochur, and he eventually turned his life around, and became a well-known talmud chacham (of course, R’ Bender never says who he is.)
We in the CR can’t say someone should be kicked out of a school.