Over the years I have been in some canoe parties that had a "problem child" in their midst. It does not happen any more because I have learned to take preventive measures. If someone is new they are well instructed in what to bring and what to leave at home. If they look to be getting in over their comfort level an overnight near home should have them pulling out of the main trip. ;)

The travel distance is always adjusted  to keep the group happy. This thread has made it clear that an ambitious schedule puts many in foul moods when the pains become real. I have headed in with new trip mates that think they want to really put in the miles. After a few portages the reality sets in and the route is adjusted so all will have good memories. :)

Of course the best laid plans do not always work out. When a problem starts to fester it is time for someone to step up and protect the rest of the group. A stern face to face talk sometimes takes care of an annoying issue. I would rather face the consequences of a confrontation than put up with growing resentment among the group. >:(

The group member that bothers me the most; the one that wants to shorten the trip by a day or two. The preventive measure, don't get near the exit until the trip is over. ;)