This would be very nice if the contents would still be linked to this certain member. You could do that by generating a new account with the membername plus a given Suffix and transferring all content to that new Account. Therefore all account data would be gone and all content would be preserved and still linked to one certain member.
Example: "mike" would be "mike_deleted" after deletion of the original account.
Right now, all content of deleted members merge up in the guest account, which is not very nice.
And i got a bug:
After requesting a deletion, the Info boxes end up empty all the time: