How do I completely disable drag-n-drop and the ctl+x features?

Out of about 2 dozen users of a spreadsheet of mine, there is one individual
that keeps dragging cells around, which completely messes up all of the
formulas - even though I've told him at least a half-dozen times not to.

The worksheet is locked and protected, save for the cells that are available
for user input.

Thanks!!!
Rich