You know, I still think the best solution would just to not allow people who disabled rep to view their rep comments.
Lock a user's ability to disable/enable rep after switching to/from it for a few days.
Only pay attention to people who truly left offensive/bannable comments in reps, any and all other "drama fest" reports would be ignored and even punished with either temp. ban and/or force disable their rep for a few days. Eventually people would leave GMs alone about it.
Problem solved. Ohhhhhh well.