Barking mad, the lot of them.. and copyright theft.. but if you watch it, filmed in a narrow street, maybe only about 5 or 6 rows deep but looks more with clever editing, rent a crowd again? Lots of noise, not a lot quantity wise.
Don't disagree, but not one of perhaps a hundred Russians I know would attend such an event... however there are 10++ million in Moscow (size of London) and it hosts all sorts of oddballs like anywhere else.