We had a guy in our city rob a bank, wearing a hoodie, but it exposed a bit of his face, which showed him to be Caucasian.

Later they realized that he had used a stretchy fabric hood with a face printed on it. They sell them on the Internet, often with celebrity faces. When pulled over the head, it clings to your face, and looks a lot like a real face, if you don't get a close look. It fooled the little local cops and news for a minute. It might work well to fool facial rec, especially when all the protesters are described as looking like Kobe Bryant.