Unless you want to replace rsh/rlogin with ssh. You can only use the 
   one-key-per-person mode if ssh is not setuid. To allow one computer to trust 
   the credentials of users from another they must run ssh suid, so it can 
   allocate a low port (<1024) and read the ssh_host_key.

IMO, amy use of the `Rhosts' functions in ssh is not worth it.

i disabled them in all of /etc/ssh*_config and ~/.ssh/config.

.mrg.