Two comments:
First, I see Rich's point about the inequity of holding reservations that you have no intent of using. This may not be against the rules and it may be done within the normal reservation method, but it is inconsiderate of other members (and even other renters). Many of us recognize that the world is a better place for all if we all consider the preciousness of others. I, for one, will continue to return my shopping cart to its designated space so that the next guy doesn't get blocked from a parking spot or get dinged from a runaway cart. It is a matter of courtesy that may not be legally required, but is an act of kindness and humility. That said, I'm sure that some of my 'habits' are reprehensible to others, but I do at least try. Like any community, DVC will have its kind and considerate group and its self-absorbed contingency too. We can't legislate kindness unfortunately.
Second, many have pointed out that there is an emphasis on busy times and weekdays. If this is true, then the problem exists in the point schedules. They should balance the demand for the different seasons and times of the week. If the point differences don't adequately account for the perceived value difference of the majority of owners/renters, then they are not balanced correctly. I would be in favor of redistributing points if it would equalize the demand and discourage reservation squating and peak-season renting. But, I am not convinced that this is a problem based on this thread. We could be just seeing the cases that support this conclusion.
Banter on...