By Robert F. Worth, New York Times, October 20/21, 2012

RIYADH, Saudi Arabia — Saudi Arabia did not have an Arab Spring. But it has had a revolution of sorts.

Open criticism of this country’s royal family, once unheard-of, has become commonplace in recent months. Prominent judges and lawyers issue fierce public broadsides about large-scale government corruption and social neglect. Women deride the clerics who limit their freedoms. Even the king has come under attack.

All this dissent is taking place on the same forum: Twitter.

Unlike other media, Twitter has allowed Saudis to cross social boundaries and address delicate subjects collectively and in real time, via shared subject headings like “Saudi Corruption” and “Political Prisoners,” known in Twitter as hashtags.

With so many people writing mostly under their real names — there are some 2.9 million users in the kingdom, according to one recent study, and it is the world’s fastest-growing Twitter zone — the authorities appear to have thrown their hands up [....]