I have an idea for a community builder plugin that would help with administration. The plugin would do the following things

1: If require email confirmation is enabled and user does not confirm email within a specified number of days. The account is automatically deleted from the system.

2: if users do not login at least once every x amount of days, there account is deleted.

I know many sites such as Yahoo and Hotmail that do this for their email services. How realistic is this for Joomla/Community Builder. I think this would make an admins job easier.