[otrs] Removing users

Hi guys, I know this has been discussed before, but I keep running into this problem. Here's an example. We have a client, say Company A, and our contact there is, say, jakes, e-mail jakes@company-a.com Jakes leaves Company A, now works for Company B. He puts in a good word for us there, and we get to do their network. Now Jakes is our contact at Company B, his e-mail is jakes@company-b.com. Wouldn't it make sense to be able to deactivate users and mark them in some way that they still exist, but don't show up when creating a new ticket for example? I can add Jakes as a new user with new password, I'm sure, but when I create a ticket for the new company, and search for Jakes, I get both. Hans