A good post by Esther, titled “the accidental activist“,

The [Iranian] law is invasive ‎and vague, which is why it is so easy to break. As one friend says, “The law is so ‎arbitrary that you can become an activist quite by accident.” The very ease of breaking ‎the law in Iran means that nearly all adults are guilty of something. Imagine that. ‎Granted, most people who will find themselves under scrutiny are public intellectuals, ‎labor leaders, minority rights leaders, fallen government employees, and self-proclaimed ‎activists, but the message is clear: life is insecure. ‎

Do read the whole piece.