@linux any global mesh networks that could replace ISP's?

How would you propose connecting to a mesh network without the use of an ISP? Are you thinking wireless (wifi)? For something like that to work you would need an AP/repeater every 150 feet or so. How would you cross oceans without bouncing wireless signals off the ionosphere (creating latency issues) or using a cable (requiring some entity to maintain it - $$$)?

If you break it down into the requirements to do such a thing you can start to understand why your question is a bit ridiculous.