Seems like a lot of work is required to delete an account. Couldn't most of the process be automated? Bots are great at doing tedious tasks that humans don't have time for and this looks like the kind of job that a bot could do well. In fact, you might not even need a bot. I used to manage a discussion forum a while back (although it was based on phpBB and not SMF) as well as a wiki running on MediaWiki, and for both of these sites, it was possible to completely delete a user's entire posting history and even their account by clicking a "nuke" button. Couldn't an admin do the same in these forums?
I believe MyBB have this feature too. So, SMF should have it too. I think the admin just want to give people like shorena a job. This is actually a creative idea.
Yeah, I think most forum software has the ability to do this. It's almost always used for newbie accounts and particularly spambots but I remember being on a forum once (not the same forum I managed) and there was someone with over 1,000 posts who wanted their account deleted. A few minutes later, all their posts were gone and their profile page had disappeared too.
EDIT: Found this:
I believe only patrollers can delete newbies posts or nuke them site-wide and they don't have to be reported. If you're just a local mod you probably can't do it outside of your jurisdiction unless you're a patroller as well (like Eal).
I'm guessing by "nuke", he's referring to what I described - i.e. deletion of all posts as well as the account.