Australia, South Africa, Belgium and Qatar all also reportedly use the software.
Sayed Yousif Al-Muhafdhah was arrested for spreading "false information" after he tweeted photos of police using Molotov cocktails and shotguns against protesters.
Bret Easton Ellis fumbles on Twitter while Kim Kardashian makes milkshakes.
Four men, all in their 20s, were arrested Wednesday for defamation against Bahrain's royal family.
Bahrain and Belarus better behave. And India and Kazakhstan? We're keeping an eye on you.