Way back when I was getting my Computer Science degree, the students from Taiwan were called “Team Xerox” because all of their homework assignments looked remarkably alike.
I don't know of the ethnic group involved, but when I was a TA the computer science TAs in the office next to mine were howling with laughter when comparing program printouts from two students. They were holding the pages up to the light and they were identical except for the students' names at the top. They didn't even bother to shuffle sections of the programs around. It was like comparing a Microsoft Word document to a Dan Rather faxed memo.
The best example was a class where the professor reused his major projects every few sessions so you might get the same project assigned a few years ago. One team turned in a design that was exactly the same as the professor's example design for that project he put in his library notes a few years before. The prof recognized it and those students weren't in the class after that. Oops!