Ahmadinejad Can't Take A Joke
The clampdown is in line with the authorities' uncompromising stance on the internet and bloggers. Wary of modern communications as a means of spreading political dissent, Iran is second only to China in the number of websites it filters - using technology made in America.
Large numbers of the nation's estimated 70,000 to 100,000 bloggers have faced harassment or imprisonment. The regime has acknowledged monitoring text message traffic.