default 1.6.6 installation.
as admin, export default zabbix server and create new host in a new hostgroup, then create a new zabbix admin user that has read access to this new group only.

log out, log in as the new user and import the exported template.

it starts good by saying :
"Host [ZABBIX Server] skipped - Access deny."

then it continues with slightly more weird messages :
"Trigger [FTP server is down on

] skipped - missing host"

but in the end, graph operations succeed when they should not have :
"Graph "CPU Loads" added to hosts "ZABBIX Server"
Graph "CPU Utilization" added to hosts "ZABBIX Server"
Graph "Network utilization" added to hosts "ZABBIX Server"
Graph "Disk usage" added to hosts "ZABBIX Server""

log out, log in as admin and verify that graphs indeed have been added.