I don't know if publishing such a graph is a good idea. Imagine a jealous girlfriend going through some of those 2-person clusters and finding you there with so

I don't know if publishing such a graph is a good idea. Imagine a jealous girlfriend going through some of those 2-person clusters and finding you there with some other girl. Besides, sometimes students just steal each other's work. I once caught a pair of students with two identical homework reports (me being a TA). It turned our the guy has stolen the homework solution from his classmate/girlfriend. She was not guilty. He was. In such a case, openly accusing both parties of cheating on the homework is just not fair.