[daxuak]

Arrest? Arrests are still mild. For more, they could be entitled to arrest their families as well. Let's say you throw a rock. All of a sudden, there is a possibility that the riot police are entitled to shot you or something - they will cite that they were attacked.

People throw stuff in riots where they have somehow figured out that the police won't open fire, or intentionally shot a rubber bullet in a way so that it'll do permanent damage (e.g. aiming the eyes), or use water canon with the intention of permanent damage (e.g. aiming at head & neck). If a crowd appear to be calm and compliant, or if people are enraged but can't bring themselves onto the street to protest - that is because of fear and really nothing else.

Protesting and rioting is absolutely different under dictatorships. It might be a right or a minor misdemeanor in the western world. I can assure you that it is a crime, worse than felony because this enters the lawless realm, in a lot of places.