I'm not really sure how to do the Easy De-Spam, but starting to think:
Deleting a user:
id= this might be the user id number being deleted
Deleting a post:
Finding all posts from a user:
.... wonder how to link these together and only give the power to the administrator and / or perhaps the moderator
I found these mods which may be useful by themselves or parts to perform some of the above:
MOD Name: Admin Userlist
MOD Description: This MOD lets you view all of you members and various information about them in the Admin Control Panel. From the list, you can perform various actions on multiple users.
MOD Name: Prune User Posts
MOD Description: This is an admin module for your Administration Panel. It is a very Advanced version of the pruning tool available in phpBB. You can prune forums based on users (all or individuals), groups, IPs (ranges, specific, banned), Guests and more.
MOD Name: Easy Admin Topic Notifier
MOD Description: This simple MOD notifies admins by email of new topics.