It's only a matter of when. Covering your face is not essential to a peaceful protest.
Indelible dye, detention, fingerprints, photo, dna sample; and a permanent file.
Two years mandatory jail time after a second conviction.
Sorry. I retain the right to cover my face at any time in public, whether engages in protest or not. I will dress as I see fit, and that includes hats, bandanas, etc.
Covering one's face is not, in and of itself, a criminal act. If people with microphones and cameras ha ve the right to walk round in public filming whatever they want, others have every right to walk around in anonymity.
To make merely covering one's face a criminal act—even if it makes it harder to catch real criminals—is just ridiculously authoritarian, even totalitarian.