Completely disable caching

The plugin currently gives you an option to “Disable object caching” and an option to “Disable asset caching”. I’d like to be able to disable both kinds of caching, preferably with a PHP constant, so that a site administrator does not accidentally enable caching. I cannot have caching because this breaks the popups because my site does not serve any non-media files within the wp-content/uploads directory. There is more than one website on the system where I need to prevent file-based caching from ever being being enabled. (I would permit caching only if it relied on the database and not on files on the server.)

Is there a way to control such a setting?