I took a quilt class once where the teacher put a white pearl eraser on the supply list. It couldn't be one of the standard pink erasers, it HAD to be white. Halfway thru the class I asked why specifically the white, was it better for some reason? She said no, she just likes the white better. Fortunately erasers are only a buck or two, but still.
I took a class a few years back at the Houston show with my friend Cindi. The only empty seats were at the back of the class. The woman in front of us kept chatting with her neighbor while the teacher was giving instructions, it was maddening. We tried subtle clues at first but finally Cindi asked her to either pipe down or move. Nicely, of course. I would have said it just like that. 😆