Message #71670

[Atlanta Z3]

True story from my mother on this topic.  It was early years in their marriage before kids.  Mom was waiting for dad to get home from work, to go to a play.  Dad didn't show up or call (this was way before cell phones early 50's) and Mom was furious.  She didn't speak to Dad for three days because he didn't get home until after midnight.  At that time dad worked in the kitchen of a Veteran's hospital.  A patient had died and someone had to stay until the funeral home could pick up the body.  Dad got volunteered.  When mom finally found out what happened she had to eat a lot of crow.  (Now that fact that my Dad hates plays musicals etc. has nothing to do with the story!)
Unless you know the reason for someone not showing up, don't bite their heads off - wait until you know it was just good old bad manners. 
However with cell phones etc, I think a phone cal would have been nice.  I would have left on time, sending an email with notes on items that need follow up.