I don't need to explain how the widespread availability of mesh networking wound affect the business models of ISPs and telecoms. What motivates me to talk about mesh networking today is not at all related to economics, but to politics and human rights.
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We have all witnessed in the news, the serial uprisings taking place in North Africa. Time-and-again, the first reaction of the threatened governments shutdown the internet (and other communication networks) to try and block the people from communicating among themselves and with the outside world. It has been in the hand of hackers, trying to get these populations back online.
At this point in time, it is very important to sensibilize regulators to this issue. It is urgent that we de-regulate public access to wireless networks and stop the FUD. Technological solutions to robustify access to the internet will emerge naturally from communities, because the technology is ready and very cheap.
So how can you help? Talk to your favorite politician about it. If you're a hacker, start/join a mesh community one your area. Or just read more about this issue and discuss it with friends.