Delete user, but keep name?

[christmas]

How can I delte a user BUT keep his name on all old posts? Now it seems like system call the deleted user for Guest.

Please help

[Allnick]

Create a new User Group......call it "Closed Accounts".
Move the user into it, and set the permissions as required.....thus preventing any more participation from that user.

[Marco van Herwaarden]

The username on posts does not change, but the users usergroup will be reset to Guest on these posts.