No I expel people that disrupt the class(usually n00bs) who just want to annoy me. I didn't really start mass expelling until I had been teaching for about 3 hours and 6 people were in my face talking and hiding under pots...
._. I was so annoyed I told them to "SHUT UP!!".
I agree though the cave should be larger, and maybe even have some special things in it, like a draisine.
