Brazil’s Vinegar Uprising

"Like other demonstrators, he had brought some vinegar. The idea is that breathing through a cloth soaked in vinegar neutralizes the effects of tear gas, though this doesn’t really seem to work. The police claim that the product can be used to make bombs, but this is even less true. Mr. Locatelli was released two hours later. But the damage had been done. Over the next week, as the protests spread to cities around the country, the arrest became a mocking rallying cry. Someone started a campaign on Facebook to legalize vinegar. Another created a “V for Vinegar” page, a reference to the graphic novel “V for Vendetta.” The “Salad Uprising” had begun."

http://www.nytimes.com/2013/06/22/opinion/brazils-vinegar-uprising.htm