Oh they can disrupt things but not to the extent of blocking roads. Yes they are seen and made into the headlines but did they really change the minds of people? I dont know, if there are surveys about it Id love to see the result. Because thats the only way to really know if the method is really working.
People have to go to work, school, or for medical/emergency reasons. These are average people who have places to go to, most of them work to feed their family. And there is probably a punishment if theyre late. Of course they have the right to be pissed off.