What happens with the post history when a user is deleted?

When a user account is deleted from Wide Narrow, the name will still be visible as history on posts qualified and commented by the deleted user.

It is possible to anonymize the name of a deleted user to not display the name on qualified and commented posts.

Contact Wide Narrow Support if you want to anonymize deleted user accounts.

User Access: Only Superusers with Admin permissions can delete user accounts in the Admin feature. 
All users can comment on posts. Only Superusers can qualify posts.