Greetings.
Here it goes...
This hack would check member's last login and if it has been a specified amount of time (Like 30, 60 or 90 days) since their last log in, then the member would recieve an email letting them know that they are about to be deleted from membership to the UBB and to avoid being deleted they should log in within a reasonable amount of time (Perhaps 7 days).
The amount of time before the inactivity email is sent out should be dictated from the CP.
I'll hit the books to see if I can come up with it, but I'm realistic and admit my perl is not too good. Hopefully someone can start this.
Regards
Rabriar