Hi, there was a Suggestion in 2013 about this but it is "Declined"
http://kendoui-feedback.telerik.com/forums/127393-kendo-ui-feedback/suggestions/3796132-disable-columnmenu
I have made a comment about this:
it is not supported the same way as disabling sorting or filtering but only with some Javascript which is not a good solution and not consistent...
please add this to the grid
robert