Well you should add this, because some times i find a cheater, and must delete him from all sites and it takes alot of time to browse each each (i have 25) and check if he's there.
Also, when i edit trade and check some more network shared sites to apply the change - it works fine except for the 'timed forces' option. this doesn't affect other sites.
Another little thing - the red link for 'update available' will not disappear if you update your shared network sites with 'mass update' option. they will be updated, but the link will stay.