Should /nonexistent home dir actually exist?

[George Hartzell]

I just noticed 

  a) that several accounts (from ports stuff, it seems) on a -stable
     system use /nonexistent as their home directory

       (ghost)[9:50am]log>>grep nonexist /etc/passwd 
       pop:*:68:6:Post Office Owner:/nonexistent:/sbin/nologin
       www:*:80:80:World Wide Web Owner:/nonexistent:/sbin/nologin
       nobody:*:65534:65534:Unprivileged user:/nonexistent:/sbin/nologin
       gdm:*:92:92:GNOME Display Manager:/nonexistent:/sbin/nologin
       dnslog:*:1002:1002:DJBdns Logger:/nonexistent:/sbin/nologin
       dnscache:*:1003:1003:DJBdns Cache owner:/nonexistent:/sbin/nlogin
       stunnel:*:1004:1004:stunnel Daemon:/nonexistent:/sbin/nologin
       cyrus:*:60:60:the cyrus mail server:/nonexistent:/sbin/nologin
       ldap:*:389:389:OpenLDAP Server:/nonexistent:/sbin/nologin

and

  b) that it seems to exist....

       (ghost)[9:50am]log>>ls -la /nonexistent/
       total 20
       drwxr-xr-x   2 ftp     ftp     512 Jun  1  2003 .
       drwxr-xr-x  20 root    wheel   512 Jan 15 12:07 ..
       -rw-r--r--   1 dnslog  dnslog  771 Jun  1  2003 .cshrc
       -rw-r--r--   1 dnslog  dnslog  255 Jun  1  2003 .login
       -rw-r--r--   1 dnslog  dnslog  165 Jun  1  2003 .login_conf
       -rw-------   1 dnslog  dnslog  371 Jun  1  2003 .mail_aliases
       -rw-r--r--   1 dnslog  dnslog  331 Jun  1  2003 .mailrc
       -rw-r--r--   1 dnslog  dnslog  801 Jun  1  2003 .profile
       -rw-------   1 dnslog  dnslog  276 Jun  1  2003 .rhosts
       -rw-r--r--   1 dnslog  dnslog  852 Jun  1  2003 .shrc

The name suggests that it shouldn't actually exist, presumably as a
security measure.

Should I leave it as is, blow away the /nonexistent homedir, is it a
ports problem, or ???

g.