There seem to be two topics under discussion.
1) is this good chinuch.
2) op says the story is drivel.
as to the first I will cede that telling such things to some will drive them away. whether a BY or Yeshiva ought to take that into consideration I will leave to others to comment on.
as to the second I have to say again that there is punishment in this world and the next for avairos. How dare you call it drivel?!
This is one of the shlosh asar ikarim. As to the the specifics I am not in a position to know and neither is anyone else here.
but the idea is basic.
I remember a shmooz where the rav said, “be sure you are not including yourself in birchas haminim!”.