The Open Access publishing model does not make a publisher predatory. Their unethical business practice does.
From Piled Higher and Deeper (PHD Comics)
Open Access is the free, immediate, online availability of research articles combined with the rights to use these articles fully in the digital environment. Open Access is the needed modern update for the communication of research that fully utilizes the Internet for what it was originally built to do—accelerate research. -- SPARC
As with all information, vet your source and/or the journal where you'd like to publish.
Open Access by