When Anna and Elsa first started doing meet-and-greets in Norway, the line formed at 9:00 (when World Showcase wasn't even open yet) and grew to a steady 4-5 hour wait. Norway was overwhelmed with people and it became a choke point. Soon thereafter, CMs announced to people in line that only one member of the family needed to wait in line, and the rest of the party could do other things. A sub-group of society soon formed, known as the "Frozen Dads". The dads waited in line while the rest of the family went about their business. And no one seemed to complain, because everyone was of like mind. The same thing could apply to CP. If everyone in line agrees to honor the "honor system" and decides that only one person per party needs to wait in line, then everyone would be affected equally and no one would be breaching any protocol or etiquette. So I would give that a try. In a loud voice, ask all of those around you if it would make more sense for only one person per group to wait in line, with everyone agreeing to meet back in line at a certain amount of time before the show starts. If everyone (or the majority) agrees to the same protocol, then you will have established the "accepted protocol". And those who refuse to participate have no one but themselves to blame. After all, having everyone wait in line isn't the most efficient way of doing it. It certainly isn't the only way of doing it. It is just done because no one is bold enough to think outside the box to offer the better solution. Disney would much rather have more people roaming WS buying food, drinks and souvenirs than waiting in a static line.