Members of Mexico's drug cartels are really starting to harness the power of the internet, using it to run positive PR campaigns, post selfies with their pistols, and hunt down targets by tracking their movements on social media. Antoine Nouvet from the SecDev Foundation, a Canadian research organization, has been working with drug policy think-tank the Igarapé Institute on a project called the Open Empowerment Initiative.

The grassroots campaign to break Saudi Arabia’s ban on female drivers isn’t set to start until Oct. 26. But a lot of women aren’t willing to wait that long. They’ve already recorded themselves getting behind the wheel in major Saudi cities. And although a few were stopped by police, many more have been inspired to take to the streets. Support has poured in from all over the world, and they now have an official song for their campaign.

The active presence of Iranian Foreign Minister Mohammad Javad Zarif on Facebook and Twitter has been a great tool and venue for Iran’s public diplomacy with Western journalists. It has also served as an unfiltered source of direct interaction between Zarif and the Iranian Internet-savvy youth.

A World Cup berth appears unlikely after their home defeat to Nigeria but a growing legion of Ethiopian fans are taking to Twitter to lure overseas-based players eligible to represent the Walyas. Nigeria came from behind to snatch a last-gasp 2-1 win over Ethiopia in the first leg of their playoff in Addis Ababa after two goals from Emmanuel Emenike helped them take a big step towards next year's finals in Brazil.

Glenn Rogers lives in Brooklyn. He’s from Australia. Most importantly, he has no affiliation with Rogers Communications. Yet none of those easily obtainable facts were enough to save the entrepreneur from being on the receiving end of a torrent of angry messages unleashed by Rogers customers in the throws of a collective Twitter fit Wednesday night.

Countries all over the world, dictatorships and democracies alike, have in the last few years sought to tame — or plug entirely — that real-time fire hose of public opinion known as Twitter. But on the sidelines of the General Assembly meeting over the last couple of weeks, ministers, ambassadors and heads of state of all sorts, including those who have tussled with Twitter the company, seized on Twitter the social network to spin and spread their message.

One thing we learned about Twitter this week: its user base is very international and growing more so by the day. That's not an inherent problem; it may indeed be an opportunity as most global ad growth is happening outside the U.S. But this is a problem: Twitter appears to be reaching full penetration in the U.S.

One small "hashtag" fueled by a big dream has spread from the West Coast to the East Coast, inspiring everyone -- kids, parents, even celebrities -- to pack lunchbags for those in need. The idea behind this nationwide grassroots movement, dubbed Hashtag Lunchbag, is quite simple: Gather a group of your friends to pack lunches, pass those lunches out to people living on the streets of your neighborhood, and then document your efforts on Twitter, Facebook, or Instagram to inspire others to do the same.