Yeah, that backfired on us once. We had a sub for German class, a very nice older lady with a German accent. So we all switched names. Had a good time with it. Then a few weeks later our pregnant teacher had problems with her baby and had to take her leave early, and they brought the nice German lady in as our teacher for the rest of the year. Poor thing never could get our names straight, even after we admitted what we had done.
Not related to your reply but, the Marines did a study and found out that just a couple of malcontents would influence an entire platoon's attitude.
I took that to heart and looked for those two in each of my classes right off at the beginning of a semester. They usually revealed themselves by day 3 and we had an outside the door heart to heart. That fixed it, they could drop the class or fix their attitudes. It went both ways.