get the small communities to use different alt coins within their area. and if they want to trade internationally they would convert their value into the international currency... bitcoin
problem solved without having to mess with everyones blockchain
But it doesn't mess with anyone's blockchain. Same blockchain, everyone sees your transactions still. You simply trade within your own small community amongst people you TRUST.
You have to understand that a rapist using bitcoin to buy hookers and then raping then and killing them is not helpful to our economy. So we really need to be the bull and horn the shit out of any asshole in our way, or in other words just don't trade with them. Bad people hurt our economy, but with smaller mini-economies, we can be sure that within that community it's OK. The only problem is the shipping. So if someone with your mini-btc community lives on Tom Hank's castaway island, you're gonna pay out your ass. But that's OK I guess in some cases because the value might be greater in doing just that... paying a little more for shipping than you'd like. It depends, it's all situational. But I think for shipping we could just GET OFF OUR ASSES AND SHIP IT OURSELVES if they're not too far away. And because you like the person in your community who happens to live a few hundred miles from you, you probably won't mind going to see them. And you can always pay someone within the same community to do it! I'm not gonna say you can't have a huge community. But that's hard to manage and because even the most good people in the world make mistakes, it's hard to make sure they won't let in anyone who won't try to screw everything up for everyone else. But I won't say that it's not possible to have a huge community and everyone in it understand how to make it last forever. It's just more of a pipe dream for now, i think.
This is world wide change. But the current bitcoin technology is only the beginning. The idea is to DESTROY bank's control of our money and taxes. DESTROY the value of gasoline for instance (eh hemm... shipping co$t$) and make everything affordable as long as you put the work in. Shipping won't cost much, gas won't cost much. This however will only ever get accomplished when WE GET OFF OUR LAZY ASSES and start making smaller businesses and use our brains to invent things that can help the individual better do everything he needs to to do to survive, BY HIMSELF. So to make our own gasoline, not hard. Biodiesel, not hard. Small car company with ZERO computer chips/black boxes installed under the hood so the NSA can't track us? EASY! We just need to not be afraid to stand up against the government and take our society back. We have been living in fear for so long, and while a lot of people are on board with some of these ideas, most are too comfortable being afraid of the government to actually implement them.