deleting a user from portal

We have an 5.21 extend portal. User authentication is done through Ldap. Is
there a way to delete all users things in he portal? All settings,
documents, without removing the user from ldap?

I suppose some database editing will do it, but thats not preferred I
assume.
We have some users that made a mess of theire profile , and we want to start
clean with them.

Paul