Description of feature:
When self-deleting an account via IBR, instead of instant remove it should disable the account and clean up the data after a configurable period of time (e.g. 3 days).
This feature would likely belong in mod_user_account_management.
It is not uncommon for people to accidentally delete their accounts from within clients. This can be a combination of people not understanding what they are doing, not reading warning messages, lack of proper confirmation in the client, or even bugs causing clients to send XEP-0077 deletion requests erroneously.