Well except that double-clicking on a document tab IS a shortcut to the menu command View Menu --> Full Screen. So, Full Screen view can be activated by either the menu, the shortcut Alt+F10 OR the shortcut of double-clicking on a document tab.

What I would LIKE to do is disable the double-click on a document tab, but since that might not be possible, I'd like to disable ALL shortcuts to the Full Screen command, and if that is not possible, disable the Full Screen command altogether.

See? Nothing to do with the mouse.

Mouse-driven events like move, press, release, double-click, wheel click, etc and their combinations are not shortcuts.

Regarding Full Screen command, it's an always-enabled command. You can bind a new shortcut to it, or replace the default one, or remove all. But still it has nothing to do with mouse clicks. They are not bound to this command. Effectively double-clik on the file tab duplicate the Full-Screen command, does not call it directly. It's just like selecting text in the editor. You can select text with Ctlr-K,B, Ctrl-K,K commands, and mouse press->move->release events. Latter way can not be changed.