Why are these men dressed as women? Apparently it happened when the activist Majid Tavakoli was arrested in Iran, and the government released (doctored?) photos of him wearing a chador and a scarf around his head in a suspected attempt to embarass him. Instead, it encourage other men in and out of Iran to post photos of themselves dressed the same way as a brilliant way to protest against the government and their actions.
See IRAN: Apparent attempt at humiliating activist sparks widespread hijab backlash in the Los Angeles Times for more details.
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Smart People I Know 
The Iranians really know how to make a protest. This one’s inventive, peaceful, direct and leaves its mark. Fair play to them!