Another one. I'm a little more traumatized by this one. It wasn't really slowly building; it was out of the blue. This woman said that we were the rudest group of individuals we'd ever encountered, and we were all doing our typing and crafts and stuff while people were reading, and we all had to be heard but we couldn't care less about the stuff from the rest of us.
I'm fairly sure that this was directly related to me saying that we had 9 minutes without time for chatter in between. And we were pretty good about doing that, but see above on giving feedback (not much).
Everyone who remained is fine. We got off to a slow start in part due to surveys and a grab bag of clothing.