If I had an annoying person - I'd just say "excuse me" and get up and leave, or go talk to someone else.
I usually don't take classes. They always seem to include stuff I don't want. I may not like all the blocks being made, and would rather substitute another block. Did a Craftsy BOM, decided that the paper pieced blocks looked too messy, and made other blocks with points for the practice. Since no one sees the finished blocks except me, it doesn't matter.
You have a hard time doing that in a live class.