Paid “anarchists” are really sort of amusing and pitiful, under their own terms. Worthy of ridicule, under their own terms. There are anarchist forums, I know, I used to troll them.
What they are doing is committing arson and rioting. They should be arrested pathetic or not. Also when a bunch of them show up at the same time and do the same things that is evidence of organization. If caught in the act and given a choice between a possibility of a lot of hard time and giving up the organizers some of them will flip. It is worth doing.