TYPO3 Core

Shure, i created a normal repository and inserted a function, that will fetch the hidden records:

        /**
     * Finds records with the given emailWildcard, includes hidden records
     * 
     * @param string $emailWildcard
     * @return \TYPO3\CMS\Extbase\Persistence\QueryResultInterface
     */
    public function findByEmailWildcardWithHidden($emailWildcard){
        $query = $this->createQuery();
        $querySettings = $query->getQuerySettings();
        $querySettings->setIgnoreEnableFields(TRUE);
        $querySettings->setEnableFieldsToBeIgnored(array('hidden'));
        $query->setQuerySettings($querySettings);
        return $query->matching($query->equals('emailWildcard', $emailWildcard))->execute();
    }

    /**
     * Initializes the blacklist repository
     */
    public function initializeObject(){
        /** @var $defaultQuerySettings \TYPO3\CMS\Extbase\Persistence\Generic\Typo3QuerySettings */
        $defaultQuerySettings = $this->objectManager->get('\\TYPO3\\CMS\\Extbase\\Persistence\\Generic\\Typo3QuerySettings');
        // don't add the pid constraint
        $defaultQuerySettings->setRespectStoragePage(FALSE);
        $this->setDefaultQuerySettings($defaultQuerySettings);
    }

                $blacklistEntry = $this->blacklistRepository->findByEmailWildcardWithHidden($vote->getEmail());
        if($blacklistEntry->count() <= 0){
            $blacklistEntry = $this->objectManager->get('\EngineProductions\EpAwards\Domain\Model\Blacklist');
            $blacklistEntry->setHidden(TRUE);
            $blacklistEntry->setEmailWildcard($vote->getEmail());
            $this->blacklistRepository->add($blacklistEntry);
        }

$statement .= $this->getPageRepository()->enableFields($tableName, -1, array_combine($enableFieldsToBeIgnored, $enableFieldsToBeIgnored));

    $querySettings->setIgnoreEnableFields(TRUE);
    $querySettings->setEnableFieldsToBeIgnored(array('hidden'));

Do you have more Enable fields beside the hidden field?

The default ones, starttime and endtime, but both aren't set for the records.

There are two ways to ignore enable fields.

- Ignore ALL enable fields

   $querySettings->setIgnoreEnableFields(TRUE);

- Ignore ONLY SOME enable fields

    $querySettings->setIgnoreEnableFields(TRUE);
    $querySettings->setEnableFieldsToBeIgnored(array(namesOfTheConfiguredField));

The namesOfTheConfiguredField is the name in the ctrl section from your TCA and not the name of the field in the database.
For your code this means you should write 'disabled' instead of 'hidden'.

Aha, so this was just a misunderstanding of the functionality. My bad, This ticket can be closed then, because it's working.