As a users Buddy you will. Have access to ‘Manage this User’ area on their Wiki-Me page. 

  1. Click on ‘Manage this User’ from their page (you may need to click ‘Show More’ options in the Quickmenu. Then click on the ‘Permissions’ tab
  2. To confirm (veto) the Wiki Owners sharing of their Wiki (and any other Sharing in Wiki-Me) you can click ‘Confirm’ under the ‘Share’ row. Or to disable all Sharing for the user turn off ‘Allow’ under the same heading.
  3. Click ‘Save’