it's way worse than that; they utterly paralyze the country. These protests are huge, thousands and thousands of people cutting out all the key entry/exit points to the city. Very often cutting off the train tracks.

They are useless scam, but they are incredibly well-organized and know exactly where to choke production. 

 What I wrote was an understatement, my apologies. It must be incredibly frustrating for argentinians, but hopefully these people will come to their senses (unlikely though).