I think these stories happen more often in the provincias than we realize.
a year and a half ago when I was in Puno, they burned down the airport and we had to bus to Areaquipa to fly back. My boss was in Cajamarca and the taxi had to go about 50 miles out of his way to get to the mines via backroad because of protests. The trains in cuzco have been halted more than 8 different times this year.
The protests in this country, and I will say this bluntly, are ignorant.
They are angry and want change, fair enough, but they harm people, and usually not the people that can effect change. QUite often they are funded by Humala who has on several occassions been caught bringing in bussloads of paid protesters (read agitators) to enhance the protest experience.
A couple years ago the teachers protesting for better wages and working conditions stoned a young girl to death for going to class anyway.
And these same people cry foul when the government starts cracking down on them...I have no sympathy.