88 Users?

Hello,

In the "Users" panel of my Lion Server app, it lists 88 users, when it should only list three. Of those unexpected 85, I have users like "_krb_anonymous" and "AMaViS Daemon" as well as "Jabber XMPP Server" and "Screensaver." It's not listing all of the active processes, which I thought at first. What is going on here?

I don't want to remove the users from the User panel, because I'm afraid it might delete something important. Can I just remove these phantom users without consequence?

Thanks!