There's a lot written about "social selling" in tech these days, and how to use Twitter to engage your prospect, but this week we are all seeing just how trivial a use of Twitter this is in comparison to the power it can have on a global scale. I flew from New Delhi to Istanbul a few days ago and as I flew the PM of Turkey,  Mr Erdogan, shut down Twitter in Turkey. I was in the air, reading the news on line (36,000 ft up) on Turkish Airlines [...]