BTW these are all things that protesters experience, as the police as trained in "crowd control" techniques which involve kettling and provoking masses of people so they can exert force to teach them a lesson.
And judging by the pictures, very few of the protesters were desperate, tired, hungry, downtrodden, etc. For most, it's an opportunity to virtue signal for a day or two, and then go back to their relatively affluent lives and forget about all of this.
Hardly a one would be caught dead tutoring some inner city kid with their algebra. Far more fun to taunt cops in an impossible position.