As the Wall Street journal reports
Tehran's leadership faces its biggest crisis since it first came to power in 1979, as Iranians at home and abroad attack its legitimacy in the wake of June's allegedly rigged presidential vote. An opposition effort, the "Green Movement," is gaining a global following of regular Iranians who say they never previously considered themselves activists.
and consequently the heat is being turned up on those use the medium of the internet
Dozens of individuals in the U.S. and Europe who criticized Iran on Facebook or Twitter said their relatives back in Iran were questioned or temporarily detained because of their postings. About three dozen individuals interviewed said that, when traveling this summer back to Iran, they were questioned about whether they hold a foreign passport, whether they possess Facebook accounts and why they were visiting Iran. The questioning, they said, took place at passport control upon their arrival at Tehran's Imam Khomeini International Airport.
Ht-Suw and Kevin Charman-Anderson