First off- what did your aunt put your grandma down for a reference for? If ur aunt put ur grandma down for a place in which ur aunt resides the collectors are more than welcome to call...but with restrictions...

If ur aunt went and filled out an application at the local grocery store and somehow an agency obtained information off of her application, than someone's going to be in lots of trouble and the authorities should be involved.

Debt collectors may try to reach you at home or at your place of employment. At home, they can only reach you during reasonable hours and not more than like three times a week. At work, they cannot call more than once a week. Under no circumstances may they contact you in person. Anything that does not fall in these guidelines should be reported.

You can't file a civil suit on this issue, there is no foundation. There were no actual damages to consider pursuing. If the school were to ignore the mother's complaints, or the boy actually caused physical damages (or in some cases extreme emotional damages which is much, much harder to prove) then there is a possibility of litigation. Until then, this is a criminal matter and the mother did a very good thing by getting authorities involved. And even better, you didn't blame her for anything! What a great mom!