> At my most mystified, I proceeded to release a class announcement warning students not to plagiarize the academic integrity assignment.
To cheat on the very assignment that is giving you a second chance is ... stupid and/or brazen and/or pitiful.
So, why warn the students again? This was their second chance, right?
I'm open to many reasonable definitions of justice, ethics, and fairness. However, at that point, given the context, reporting the offending students seems the most just thing to do.