Social media outrage rarely translates to active political participation. Part of the reason the Arab Spring was the subject of international awe and amazement was because it was the exception, not the rule.
The vast majority of social media outrage does not translate to participation. It is done for selfish reasons. People express outrage at an injustice to show their moral superiority. They crave the likes and shares that expressing outrage generates (nothing garners shares like expressing anger at social injustice).
Malcolm Gladwell wrote in the New Yorker, "“Facebook activism succeeds not by motivating people to make a real sacrifice but by motivating them to do the things that people do when they are not motivated enough to make a real sacrifice.”
The people sitting on Twitter and Facebook are often not the ones participating. When the student protests occurred in Tehran, most of the social media posts about the protests originated in the West. That is because the people participating were all out protesting.
A 'clicktivist' is not the same as an activist. While an activist has positive effects on society, clicktivism is an exercise in vanity and narcissism.