def get_model_perms(self, *args, **kwargs):
        return {
            'add': False,
            'change': False,
            'delete': False,
        }
It seems this is only used for the list view. NICE :-)
dataset/ETHPy150Open divio/django-filer/filer/admin/clipboardadmin.py/ClipboardAdmin.get_model_perms