Other than removing the "Paste from word" and "Paste" buttons, is it possible to force all forms of paste such as Ctrl-V and Right-Click-Paste to always perform a "Paste Plain Text" action?

 

Yes.

Editor.EditorOnPaste = CuteEditor.PasteBehavior.PasteText

 

Specifies the manner in which the editor handles pasted text.

PasteBehavior Enumeration
Enumerates the manners in which the editor handles pasted text.

Members:

Member Name	Description
Default	When you paste text into the editor it is not processed.
Disabled	Paste function is disabed.
PasteWord	When you pasting the content from Word into the editor, the non-required code that usually comes with pasting from Word are automatically cleaned up.
PasteText	When you paste text into the editor, all HTML formatting is stripped. This option is ideal for content management systems where you want absolute control over the formatting
ConfirmWord	When you pasting the content from Word into the editor, will prompt users with a popup prompt to clean the non-required code.