While freedom of speech is the general rule in the U.S. and in the European Union (I), there are nevertheless exceptions to this freedom on both sides of the Atlantic (II). Some of these national exceptions aim at preventing hate speech, defamation, or threats, while others aim at preventing speech which is considered in other countries as the mere expression of an opinion, albeit unsavory, but nevertheless legal. Social media sites allow the rapid spread of all speech, whether protected or not, and such messages spread around the world, and sometimes stir people into action. Social media played an important role in the Arab Spring, the London riots, and the Occupy Wall Street movements. But while the web links us all, each country nevertheless retains its own legal framework, and may or may not view a particular speech, such a blasphemy or lèse majesté, as legal.