Rick: I can see where the time thing could chap your hide. That is just an issue of common decency. Folks should be in attendance on time and when expected. And it's a wonder the audience didn't leave if the guy was checking his watch. I sure would have!

Some things I have learned from working with others is the basic 'Golden Rule' stuff. I wouldn't want anyone else to show up late, be rude, etc., so I won't do it. That and before getting my shorts in a knot, taking a breath and wondering if the situation will matter 'a year from now'. A person being late/rude on one occasion isn't really worth the hassle, but collaborations that are more long-term require the group members to deal with situations that may affect their performance in the future.