Before Egypt’s uprising two years ago, this kind of open debate about the president would have been unthinkable. For nearly three decades, former president Hosni Mubarak exerted near total control over the public sphere. In the twilight of his term, he imprisoned a famous newspaper editor who dared to publish speculation about the ailing president’s declining health. No one else touched the story again.

To Western observers, the freewheeling back-and-forth in Egypt right now might sound like the flowering of a young open society, one of the revolution’s few unalloyed triumphs. But amid the explosion of debate, something less wholesome has begun to arise as well. Though speech is far more open, it now carries a new and different kind of risk, one more unpredictable and sudden. Islamist officials and citizens have begun going after individuals for crimes such as blasphemy and insulting the president, and vaguer charges like sedition and serving foreign interests. The elected Islamist ruling party, the Muslim Brotherhood, pushed a new constitution through Egypt’s constituent assembly in December that expanded the number of possible free speech offenses—including insults to “all prophets.”

Worryingly, a recent report showed that President Morsi—a Brotherhood member, and Egypt’s first-ever genuinely elected, civilian leader—has invoked the law against insulting the presidency far more frequently than any of the dictators who preceded him, and has even directed a full-time prosecutor to summon journalists and others suspected of that crime.

“The repression used to be more limited and strategic,” says Heba Morayef, a researcher for Human Rights Watch in Egypt who has tracked the spate of new laws and prosecutions. “Now, the scary thing is that it’s all over the place.”

The Muslim Brotherhood, as it rises to power, is playing host to conflicting ideas. It wants the United States to view it as a tolerant modern movement that doesn’t arbitrarily silence critics, but at the same time it needs to show its political base of socially conservative constituents in rural Egypt that it won’t tolerate irreligious speech at home. And it wants to argue that despite its religious pedigree, it is behaving within the constraints of the law.

For the time being, Egypt’s proliferating free expression still outstrips government efforts to shut it down. But as the new open society engenders pushback, what’s happening here is in many ways a test case for Islamist rule over a secular state. What’s at stake is whether Islamists—who are vying for elected power in countries around the Muslim world—really only respect the rules until they have enough clout to ignore them.

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Egyptians are renowned throughout the Arab world for jokes and wordplay, as likely to fall from the mouth of a sweet potato peddler as a society journalist. Much of daily life takes place in the crowded public social spaces where people shop, drink hand-pressed sugarcane juice, loiter with friends, or picnic with their families. But under the stifling police state built by Mubarak, that vitality was undercut by fear of the undercover police and informants who lurked everywhere, declaring themselves at sheesha joints or cafes when the conversation veered toward politics.

As a result, a prudent self-censorship ruled the day. State security officials had desks at all the major newspapers, but top editors usually saved them the trouble, restraining their own reporters in advance. In 2005, when one publisher took the bold step of publishing a judge’s letter critical of the regime, he confiscated the cellphones of all his editors and sequestered them in a conference room so they couldn’t tip off authorities before the paper reached the streets.