I once posted a story about R’ Shmuel Berenbaum zt”l:=, which I heard from my Rosh Yeshiva.
A boy in the Mir got into gambling, and built up debt to some shady people. To try and pay it off, he got other bochurim involved in it. My Rosh Yeshiva, who was a bochur at the time, went with a few other guys to R’ Shmuel to try and get the guy kicked out. R’ Shmuel screamed at them, and refused to kick him out. R’ Shmuel took the guy under his wing, and helped him out. The guy is now a well-known talmud chacham.