It looks like the Sudanese security people are on to the potential of this social media thing:
The protestors, largely students and youth, have used Facebook and SMS to communicate with each other. Security forces Thursday used the protestors’ own tactics against them, according to Ahmed.
“The security forces themselves, they sent messages to people to gather in a specific area to protest. When people went there to protest they saw the security forces arresting them immediately when they arrived in the area,“ said Ahmed.
I think any calculation of the actual effect of social media on protest comes down to the question "how smart are the local cops?"
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