As a newbie sub, I learned not to ask other students for their classmates' names. Even the most "reliable" of the good students "doesn't know" the names of the misbehaving students (even though they've all been in school together since kindergarten).
It's a snitch thing. No student wants to "snitch" on his/her peers.
Last Thursday I covered middle school pre-algebra. They had worksheets. They did them. The bell rang, and the students filed out to go to lunch.
I made sure I was set up for the next group. But the room wasn't clearing out as quickly as it normally does. The students were stuck. Um, what...?
One seated girl had her leg propped on a nearby desk, blocking the only path through the room to the door.
Because of the traffic jam, I could not get to the girl. I called out, but she couldn't hear me. Then whatever was going on settled, for the girl stood, and everyone could pass. I tried to get to the girl (I wanted to have a little discussion about blocking pathways in small classrooms), but she left, apparently not hearing me calling out to her.
Quietly, I asked the girl nearest to me who that had been. And the girl told me!
I did not expect an answer. I expected a hemming and hawing. No snitching to the sub. But I guess preventing everyone from leaving class loses a girl certain privileges.
I understand, though. She was keeping them all from lunch!