"Occulus Repairo!" charm by Hermione

[gogoyub4ri]

No: HPFGUIDX 88532

I was just curious, she does this charm twice out of school (once on 
the train in the first book and again in Diagon Alley in the second 
book) and she never gets in trouble from the ministry of magic for 
it. Anyone have a clue as to why not? I thought all magic is banned 
from use outside of school grounds (if you're a student of course).

I'm guessing because it's not a charm that hurts anyone and is quite 
minor... but that's just my guess.

Thanks!

Lisa