The feature manager allows you to disable/enable features inside of each users cPanel. Currently only the bluelagoon theme supports this feature, however the default and iconic themes will support it shortly. At the current time this feature only removes the links to each feature from the menu; Soon it will block manual access of each feature as well (once this feature has left the testing stage). A special feature list called "default" is included that will affect all users. If you disable a feature in the default theme it will be disabled in every users cPanel, unless another feature list grants them the feature. Once you build a feature list you should edit a package and assign the feature list to the pacakge.