Don't bite my head off for this, but I think this is waaaaay overdue. Despite the fact that there are hundreds upon hundreds of Disney characters, most people gravitate towards a certain few like the Disney Princess/Heroes or the major villains. Obviously something interferes with people's participation of the game and people either drop off the face of the internet or leave, freeing up a character. Or you get the annoying brand of those who register and never post. Both cases leave an account with a name of a popular character and after so many variations, there's nothing left to tweak so that you can attempt to register for the character. (Ex there are 4 variations on Cinderella, 3 on Elizabeth Swann and Meg, a few Mulans, Susan Pevensies and Nancys)
To make it easier for incoming or present members to figure out what characters are available, member pruning is advised. Any account that has been registered for over six weeks without a post or accounts that have the same name as an accepted character should be on the prune list. It will also bring the member count down which will give a more accurate representation of how many characters are active and make the board a lot less intimidating to new members.