The meeting problem is not so hard to solve. Start at the appointed time. Close the door. If the person who organized the meeting is not there, adjourn. People will catch on soon enough. Organizations which have a chronic problem with people straggling into meetings 10 or 20 minutes late are likely enabling the behavior.
Indeed. Although what happens when the organizer is on time and the person they want to meet with is late? Leaving early only frees up the other person's time and does not solve the problem.
