Is there a way to disable the js of the Views Display Tabs module without hacking the module?
The standard practice for adding javascript is to use Drupal.behaviors to execute your modules code when appropriate.

This gives an easy way to override modules javascript by redefining that modules behavior. For Views Display Tabs I took a look at their javascript source to see that the behavior was called Drupal.behaviors.viewsDisplayTabs.

So now you can add your own javascript to override this:

//Override Views Display Tabs javascript
Drupal.behaviors.viewsDisplayTabs = function() {}