I need to restrict users (with Contribute rights) ability to create Datasheet view. Also, how may I disable Quick Edit mode in all views?
How about creating a custom permission, and in that permission uncheck the
Manage Lists option under
List Permissions, or perhaps the
Manage Personal Views option under
Personal Permissions, then give those users that new permission? Custom permissions can be created in Site Actions->Site Settings->Site Permissions, then click Permission Levels at the top in the Manage section of the ribbon.
This article might help as well: http://social.msdn.microsoft.com/Forums/sharepoint/en-US/ca95a6e1-747b-4631-bbcc-bdd5a1102a22/disabling-create-view-for-sharepoint-discussion-forum?forum=sharepointcustomizationlegacy
Here you able find the URL with clear explanation.