Laravel 5.1 ACL

I've read about the new policy features in Laravel 5.1 (http://ift.tt/1N0rApG).

It looks from the docs that a blacklist approach is chosen by default. E.g. a controller actions is possible until access is checked and denied using a policy.

Is it possible to turn this into a whitelist approach? Thus, every controller action is denied except when it's explicitly granted.

via Chebli Mohamed