email verification expire then delete

[GoTTi]

Is there a hack/addon for the forum that puts a option or adds to the forum a expiration time on new register'd accounts when verify email option is enabled, and if the email account is not verified in a certain amount of time, the account is automatically deleted and/or placed into a list to where the account(s) can be viewd by a admin and MASS deleted/dropped off the forum user list.

There is a "waiting for users" portion of registration/groups, and when there is like 200 people in there that haven't verified their email, kinda redicoulous to delete each one of them and this kind of hack would make it much easier on the services of the board.